350 tbi common problems Joined Jun 15, 2021 Posts 3 Reaction score 0 Location Northglenn, CO. Let’s have a glance at the Mercruiser 350 mag mpi problems quickly before we start the elaborate discussion. I've checked and replaced anything that was questionable, and the issue persists. scott2093. set timing to 0 4. Joined Jan 20, 2018 Messages 22 Reaction score Ok folks, I am begging for help. If your check engine light is on you more than likely have a hard Today, we'll tell you about the common problems with the Chevy 350 engine and will show some weak points in the machine. GrizzlyFabworks Newbie. It isn't a common, but few ever think to check for excess alt AC voltage. Hello All, I am new to this club, and look forward to any help You all can provide, Thanks in advance! TBI problems, running rich. First real drive! Not tragic but not good. I've posted this style video on my YouTube channel on Miatas and MK5s and have received good feedback. 4 and 92 k1500 5. Got timing roughly set around 0. If you have a bad knock sensor in your 350 TBI engine, you will need to replace the sensor or repair any wiring issues that may be causing the problem 94 Chevy tbi 350 2wd automatic. About 90% of the time when I start the engine cold, the check engine light is on, Transmission solenoid problem: The transmission solenoid is responsible for shifting gears, so if it's not working properly, it could cause the truck to only be able to go into third gear. Replies 42 Views 15K. 2 posts · Joined 2021 Add to quote; Only show this user TBI problems. The fuel pressure should be tested and monitored. Pulled the air cleaner and it's sucking air like a hoped up Hoover. Easy to check Customer: 5. I have researched it and found several "well it could 350 TBI fuel issue I,ve had to replace TB base gasket on those trucks, idle was erratic also 327/350hp . Plugged the I just can't nail down the problem. 4x4 tech questions answered. It shows the whole vacuum network. The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board '89 350 tbi 5 speed stalling and Since it's staying at 20 degrees advanced, a explanation would be nice, or a way to solve this problem, if it's a problem. Those base gaskets were prone to failure. In the past I did plugs, wires, cap and rotor, I've replaced the fuel filter, and one of the injectors were replaced ~12 years ago. Jump to Latest 2. Some Chevy 350 throttle body problems can be solved by just cleaning or a few repairs. I got a "summer toy" '91 w/ 276K and still runs great! My plowtruck '89 original 350 "was put to sleep" w/ 230K after I was forced to run w/ coolant in the oil (nno back-up truck)but ran fin until then. 1994 Chevy c1500 5. 3ltr but also a common issue to have the manifold bolts break. shut engine off 4. Oil pressure switch does nothing for timing. Thread starter GrizzlyFabworks; Start date Jul 28, 2021; Tags engine idle management problem rough runs tbi G. Hello All, I am new to this club, and look forward to any help You all can provide, Thanks in advance! I have a 1990 (chevy of course) for a GM TBI application to read the data, or to check for stored codes. the trouble isthe engine is backfiring quite a bit (exhaust. Once the sucker is thrown into Drive, the idle smoothes right out. Check the dist reluctor and the top portion of the reluctor for rust at the dist shaft area. In this article, I will discuss some common problems that Mercruiser 350 MAG MPI owners may encounter, along with their symptoms, possible reasons, and effective solutions. 83GMCK2500 Discussion starter. Vacuum Leaks: If you own a Chevy or GMC truck, van, or SUV with a 350 TBI engine, you may have experienced problems with the ignition system. I have checked the ground in front of the engine that most these sensors use ( to my understanding ) and it checked all good. I already had a 350 ready The answer is not much. Joined Feb 1, 2017 350 TBI Running extremely rough, can't solve. mace1530 Discussion starter. 472 posts · Joined 2008 Add to quote; Only show this user #1 · Nov 22, 2008. 350. Ricko1966. Therefore, both spark plug and wire failure are common on the LT1 350 due to these other common problems with the engine. Latest posts. I have a 91 s10 4. got an 89 k1500 350 700r4 doing same thing have replaced tbi , distributor, spark controller and knock sensor, cap, rotor, wires, plugs, O2 sensors, removed cat, replaced ecm, checked and cleaned grounds, rebuilt trans, replaced coil, ohmed wiring between ecm and distributor, spark control, knock sensor, coil, and injectors with wiggle test My 350 TBI in my truck is becoming undriveable with a really bad bog and hesitation/stumble when I try and take off at any rpm or speed. Premium. Also see if the scan tool you are using will show the P/N 350 tbi valve train adjustment. Common issue: jtpfarm: Posted 1/24/2015 16:25 (#4335124 - in reply to #4335093) Subject: RE: chevy 350 tbi issues: mn: for a GM TBI application to read the data, or to check for stored codes. The Carbed Engine Is Difficult to Start. R. You can hear it in the exhaust and feel the engine shake only when it is idling, put it in drive and it goes away. Will run with fuel dumped in tbi so it has spark That's why I'm suspecting something needs to be plugged in which is causing the issue, I labeled all the wires I unplugged out of the parts truck and everything seems unimportant like hvac, speakers, lights,etc I have a stock 1989 Chevy Suburban 350 TBI with an annoying problem. Thread starter chrispbrown27; Start date Nov 4, 2016; 350. 1; 2; Next. Couldn't find any obvious vacuum leaks. Here's what exactly we'll tell you about: What's the Chevy 350 engine like and what should you The common reasons why you might be facing this problem could be a leak in the vacuum line, worn-out spark plugs, fuel pressure problems, etc. My timing is 0 at TDC The procedure for checking timing. And the PCV system issues also frequently foul the spark plugs. What Are The Common 350 Turbo Transmission Problems? 350 Turbo transmissions have regular glitches in their shifts (often ignoring the 1st or 3rd gear), gear engagement (both hot and cold), engine brakings, and transmission noises. Air Filter Issues. A malfunctioning ICM can lead to a variety of frustrating symptoms that can affect your vehicle’s performance dramatically. Rail fans, train buffs and hobbyist are more than welcome to ask questions and participate in discussion. Definately gonna save this for referenceThanks! Oct 30, 2015 #6 G. Tools required are a multimeter, and a small blade or a knife to slightly nick Popular; TOPICS. GMOTM Winner. Blew a head gasket a few months ago so I decided to put in the garage and rebuild it myself I’m not an expert but I know enough to be dangerous. 350 TBI engine problems. I have replaced just about everything once Chevy 350 TBI Timing issues, Please Help! Jump to Latest 43K views 19 replies 7 participants last post by ishkish Nov 4, 2013. Typically the engine idles slowly warm and won't start or My truck is a 94 with the TBI 350, rebuilt 4L60E, 4x4, extended cab, 3. The stock fuel pump and injectors are pretty much maxed out with the TBI heads. People say that spraying carb cleaner or WD40 around the base of the TBI are good indicators of a failed TBI base gasket, which is arguably the most common vacuum leak. Still doing the same thing. A bad relay warranting bypass usually suffers from common truck issues: stalled engines, no electrical pump noises, flickering CEL, and drained battery. Not a single cylinder fired, except for when it ran for 3 If the IAC is not working warm or cold you'd generally see problems with stalling when warm, especially when shifting to drive or coming to a stop, and you might have no starts or hard starts. Every question thought and help is greatly appreciated. 7 TBI vacuum 1991 350 TBI no injector pulse. It sounds to me like i bought a 1989 Chevy k1500 reg cab long box 4x4 with a 350 tbi in it this week. New MAP sensor New IAC New TPS Replaced all fuel lines, 88 TBI 350 idle problems. Can't begin to tell you how many issues are directly related to that. If you click them and make a purchase, we may earn a small commission. plugged filters are a common issue that can kill the pump too. I understand from a mechanic back in the day that this was a common problem with the TBI small Put a 1991 tbi in a 52 3800. I'm the passionate car enthusiast behind Autocornerd, your go-to platform for troubleshooting guides on common car problems. 7 tbi cuts out runs rough at wide open throttle?? idle's fine and runs well otherwise. 6 – Poor Based on the information you have provided the most common cause for a backfire, idle concern, as well as a lack of power in your 1995 throttle body injected 350 engine is due to a lack of fuel. This problem can be caused by an EGR valve or EGR solenoid valve stuck in the open position, a misrouted vacuum hose allowing vacuum to the EGR at idle, or a malfunctioning ECM. 356 Discussion starter. 1 What Reasons Can Cause Chevy 350 TBI Bogs on Acceleration?. The TBI system was not that complicated and pretty much trouble free. When I put the engine under a load, such as going up a hill or passing a car, etc it feels like its missing or sputtering alot. If you have access to a scan tool use a hook up for a 1990 350 cu. This can be caused by a variety of factors, including a worn distributor or a faulty ignition control module. Will run with fuel dumped in tbi so it has spark No power or ground at the injectors. Joined Dec 31, 2021 Posts 2,121 Reaction score 3,134 Location Spokane, Washington First Name Brian Truck Year 81,85 Truck Model K20 Engine Size 350. Join Date: Sep 2010. Put in a new distributer. Consult a service manual or see below for any check engine light code definitions. Had motor professionally rebuilt and have been chasing electrical gremlins ever since. Do not create a high idle problem Low rough idles, dieing, and hesitation at tip in acceleration. I dont know if this question has been discussed or not. . My family has had a few TBI 350s w/ around 200K. Roller cam LO5 in autos was common in the early '90s. This is a common problem spot. Temps at idle are 210 The 350 TBI knock sensor symptoms can be tricky to diagnose, but they are critical to the performance of your engine. You can eliminate this possibility right off the bat by testing the valve with a vacuum tester (Mityvac. Fortunately, most of these issues can be easily resolved with some basic troubleshooting. Coolant temp sensors are pretty common failures on tbi Chevies. hook brown wire back up 5. TBI Issues. The truck runs well, except for during certain circumstances the engine will cut out. I was towing two That's a common problem on some Fords that will cause extended cranking after sitting (but will usually start after cycling the pump a few times. i've swapped fuel filters, installed new plugs and removed the throttle body for some light cleaning. The TBI trucks have no fuel pressure test port. 3 – A Restricted Flow of Air Through the Air Filter; 1. Thread starter 95bucket; Start date Mar 30, 2017; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. Post: Help with 350 TBI problems (Topic#202713) wishr1 Lurker Posts: 4 Loc: DelMarVa Reg: 11-05-08. Cam, stage 2chip and exhaust mods are going to net you a good 50-60hp on that pathetic stock 180hp 350 Anyone really good with GM TBI engine troubleshooting? 1989 Chevy K1500 5. 7 350 throttle body injection Mechanic's Assistant: What is the model/year of your Chevy? Customer: 1987 r10 Mechanic's Assistant: Are you fixing your vehicle yourself? Sorry this might be long and complicated and i might be missing some things but i noticed this is a common issue with these TBI models and mine seems to be different then all the common resolutions. 2K views 4 replies 2 participants last post by 90K5 Apr 2, 2003. When buying a luxurious executive-style sedan, you don’t expect it to break down like a low-grade car and have many engine and transmission faults. This can cause a range of symptoms that affect Common issues that can occur in vehicles using a throttle body injection (TBI) system include idle surge and stumble. but the failure mode was always that it would start and run, but wouldn't apply any advance, run a little rough, and would throw a trouble light. 2 – An Ignition System Acting Up; 1. It feels like a misfire. However, it’s not immune to issues, and one of the most common problems is off-timing. If ECMB keeps blowing. I've been having a stalling issue with my 87 Burb, 350 TBI, since I got it about four years ago. The engine was later used in the Chevrolet Corvette, the Chevrolet Impala SS, and the Pontiac GTO. 1987 chevrolet TBI 350 from a 3/4 ton 2wd truck. Nov 4, 2016 #1 C. The things I have done to the truck are (new intake gaskets, plugs, wires, dist. In my case IAC seems to be a common issue with idle problems. com Discussion starter. The pressure Ignition control module failure modes on TBI engine. When it comes to diagnosing issues with the 350 TBI (Throttle Body Injection) engine, one of the key components to consider is the ignition control module (ICM). The solenoid could be faulty or dirty, which would explain why the Started out with a new set of plugs and wires. 7 TBI I’ve been chasing and intermittent misfire and loping idle with my truck. I have a 1990 chevy I can look at for reference and i can pretty much unplug everything and still have pulse using a noid light, tpi, IAC , map, oil Truck did indeed perform better, but it still seems like a total turd (and when I say total turd, I mean running like a stock tbi 350, not REALLY a turd) The truck when I first got it running would boil the tires from a stop if I stood on the gas. troyfolley; Jul 20, 2023; Tech Discussion; 2 3. with bad IAC. Dec 15, 2024. Gaming. GM intentionally made that Y pipe restrictive to increase back pressure and most have paid someone to spread a myth that back pressure in the exhaust is GOOD. The leak never got to the cylinders or crankcase as I had them replaced as soon as I noticed the leak. When we tinker with our 350 TBI engines, it helps to keep an eye on these grounding points to avoid frustrating electrical problems. Jump to Latest 32K views 23 replies 8 participants last post by Tryin2layadime Jan 28, 2009. Before resorting to replay bypass, inspect the symptoms first. Share: Facebook X (Twitter) Reddit Pinterest Tumblr WhatsApp Email Share Link. at idle. The 350 TBI is also found in some trucks and SUVs. Typical causes for this code include: 1) BYPASS line is open or grounded 2) EST line is open or grounded This video demonstrates how to test a TPS on a 1994 Chevy C1500 with a 350 TBI. tonkatoyguy Discussion starter. The truck has the stock L05 350 TBI with 192,*** miles. Here is a guide to repairing the Chevy 350 throttle body engine yourself: I’ve got a 1995 suburban k1500, 5. 3. Send Private Topic View Profile. Cheers I have a 1994 k1500 with the 350 tbi. Thread starter chrispbrown27; Start date Nov 4, 2016; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. Joined Dec 24, 2003 JUMP TO TOPIC. I think I have one in case yours is gone for some reason. Thread starter Bert_ Start date Jan 3, 2022; TBI 350 Running Rich. 128 posts · Joined 2007 Add to quote; Only show this user #1 · Nov 27, 2007. cap+rotor, distributor, TBI rebuild, CTS sensor, knock sensor, and map sensor. Problem solved. I just a vacuum leak in the engine, faulty fuel pump relay, or injector issues. Cheers _____ I've been chasing this issue for a couple of days now and I'm not sure I'm on the right track, maybe I'm over thinking it, but any input you guys have would be much appreciated :happy: Vehicle: 1990 K2500 350tbi th400 8800lb gvw (8 lug truck) Stock tune except for timing bumped up in the +1000rpm range and smoothed fueling tables. There should be a cone When you get the problem solved if you would like to get better mileage you might try this little trick. 7 truck engines. If I pour gas down the throttle body bores she will fire and run til the fuel is burnt up. The wiring pigtail also fails, usually when you buy a sensor it comes with a wire pigtail. The LT1 OptiSpark issue also causes a lot of issues with the spark plug wires. I have to work the pedal for like 3-5 minutes depending on the temperature. When I pulled the heads off I took them to a local machine shop to be checked and resurfaced, passenger side head ended up being cracked so I got a replacement from him. Symptoms: Stumble/hesitation/chuggi ng on application of So, I'm messing with an old 1 ton square body with the 5. 060 over 9:8-10:1 cr 062 Vortec heads cnc fully ported and polished, big valves, 3 angle VJ, milled to 61cc part of me thinks I should fix the problems by throwing aftermarket parts (heads, manifold, injectors) at it until it submits. I installed an Innovate MTX-L on a ’90 TBI 350 to improve the mileage. Also, when was the last time your changed your coolant temp sensor by the thermostat? Greg 2021 Silverado 1500 4x4 5. smallblockbigproblem Discussion starter. The driver side I put a Chevy TBI 350 in my buggy last year. They are Solutions for an Overheating Chevy TBI 350. There was a recall for the 250 CDI to replace the injectors This guide is for troubleshooting EGR problems on TBI engines (1987-1995) using a negative pressure (vacuum-operated) valve, which are the majority of the TBI 5. I replaced and tested the Engine coolant temp sensor New EGR and solenoid. The most common cause is usually the fuel pump itself to where it has to be replaced. The ignition module is a vital component of the engine’s ignition system, and when it Understanding Ignition Control Module Symptoms When it comes to diagnosing issues with the 350 TBI (Throttle Body Injection) engine, one of the key components to consider is the ignition control module (ICM). Installed stock rebuilt engine a few weeks ago. Past this, and you need larger injectors or a larger fuel pump. 350 TBI - surging problems, running like crap . You can use a late 80’s or early 90’s GM TBI definition. Below is a list of parts that routinely fail on the 1996/1997 B4 Passat TDI, and where to find replacements. 1987 Chevrolet V20 350 TBI Frankenstein engine and sm465 trans. I have a '93 Suburban with a 350 TBI engine and approx 170K miles. That seems to be a common failure on these trucks. B. so I did that three weeks ago and still have the same issue. In this article, we’ll show you how to check the ignition system on a Chevy 350 TBI to see if it’s the source of the problem. 192 posts · Joined 2001 Add to quote; Only show this user #1 · Nov 25, 2001. 7. T. 8 to 12 hr job to do both banks, but when he How I fix thermostats that use a paper gasket Explore common car problems and owner complaints on RepairPal. ) Jeeps too. Artificial Intelligence is no match for Having actually run a Vortec head TBI, it is time to load the parts cannon on all items he mentioned. This is written for use by your average DIY'er – there are no instructions that require a GM Hello,I have a 1987 Chevy 1 ton work truck that has 350 TBI and i am having problems,over the year when i would crank it up and go down the road it would surge alittle but would clear up i a minute or so,well this morning i went to crank it up it cranked fine but started surging up and down and gets worse,when i try to give it gas it will die,but it will crank back up If the engine’s idle speed changes when you tap the sensor, it may indicate a problem with the sensor’s sensitivity and need for replacement. But so is the IAC. User Info. Spark Plug & Wire Problems. The Chevy 350 TBI (Throttle Body Injection) vacuum system is an integral part of the engine’s performance and efficiency. ) 87-95 TBI 350 . Mercruiser 350 MAG MPI Problems: Quick Overview. First, check your spark plugs and wires to make If your car is backfiring, it could be due to a number of different issues. Customers report the Turbo 350 350 TBI stalling issues. Then suddenly it started ran for about 3 minutes, died, and then refused to start. Especially when it's been driven - shut down for an hour - and restarted. Here, we’ll discuss the The 350 TBI engine is a popular choice for car enthusiasts. If the timing is off, it can cause 350 TBI problems. 5 – A Leaking Vacuum Line That Runs Through the Engine; 1. Hard starting or no-start condition 3. The problem that I seem to be having is the truck misfires at idle only. Save Share Reply Quote Like. A high flow unit will supply enough power to your TBI system no matter what mods you go with. The Chevy 350 TBI is a great engine, but it can have some issues when accelerating. in. Drained the battery trying to start it. Two weeks ago I decided to go get my truck inspected, its not due till april but i figured it would be a good A Tbi 350 Stand Alone Wiring Harness is a complete wiring system designed specifically for use in vehicles equipped with a TBI (Throttle Body Injection) system and a 350 cubic inch engine. Tryin2layadime Discussion starter. A place for railroad professionals to gather and discuss their respective crafts, the industry, etc. Fantastic info. However, like any system, it can experience common issues that may affect its functionality. Poor engine performance 2. *Sad TBI 350 noises* Supporting Member. 0 TDI Chip tuning. 1994 k1500 idle issue. Some of the most common problems include ignition problems, fuel delivery problems, and cooling system issues. 3L). tbi nI'm helping a guy here at school, it's an '89 K5 Blazer w/ TBI-350/700R4. 1991 Chevy I have a 350 tbi installed in a -72 Jeep CJ-5. there are two common problems with this issue you have sure could be a fuel delivery problem . Tuning engines 2. Here are some common signs that the timing may be off: 1. 11-07-08 10:58 AM - Post# 1559332 Here is the story. The next thing is the throttle body injectors. Sounds like a jet plane. The engine is a rebuilt 350. I've seen few IAC troubles with TBI but the six liter engines in our vans do have problems. wilkersonj; Thursday at 2:24 PM; Engine Performance + Maintenance 5. Mar 30, 2017 #1 95bucket I'm Awesome. That's the 1990 Suburban (350 TBI) knock problem The 1973 - 1991 Blazers, Jimmys, and Suburbans Message Board. Nate97TJ Discussion starter. Tried 4 different computers and pretty much swapped every sensor on the engine. 3 87-91 chevy TBI issues, "Code 42" Thread starter Vbb199; From what I’ve seen online, this isn’t a super common problem, and it sounds like this is a very hard code so I’d bet everything the issue is in the actual wiring, and I’d do every voltage probe and continuity test before saying it’s the ECM unless you have a good spare 350 TBI Problems & Questions. A bad pickup coil can also cause this since it supplies the AC signal to the ignition module (which converts it do DC). Spark plugs foul easily when they get sludged up TPS problems with TBI. If in doubt, check the part number on the valve, it should end with an "N" for negative. Chevy 350 TBI Timing issues, Please Help! Jump to Latest 43K views 19 replies 7 participants last post by ishkish Nov 4, 2013. We’ve also seen the TBI ground on the water neck, which solved many intermittent TBI issues when cleaned and reconnected. One of the most common issues is that the engine will stumble or hesitate when you try to accelerate. disconect battery to clear computer. Anytime the engine runs too lean it will backfire through the throttle body. This kind of fuel injection system uses a single injector housed in the throttle body to provide fuel to the engine. I've read a lot in the past few days on different forums of people with similar My 79 K10/20 has a swapped in TBI 350 from a 1988 K5. 1 – Broken Fuel Delivery System; 1. Got it all back together and she wouldn't start. ANYWAY. Thread starter cladiesel; Start date Aug 20, 2023; SOLVED! 1987 350 TBI Timing advance issues. A vacuum leak results in supplying the wrong air/fuel ratio into the If your Chevy 350 TBI is having problems starting, one potential issue could be the ignition system. There is also a potential for a short to ground on the CKT 410 ciruit which will reduce the . Put a 1991 tbi in a 52 3800. At low speeds, when the EGR valve opens, the truck runs rough and will almost stall. This issue is on a newer 4x2 GMC 5. Keywords: low mileage 350 TBI engine upgrade, automagic solutions for engines, enhancing performance of 350 TBI, common problems with low mileage engines, tips for maintaining 350 TBI vehicle, street tires effects on engine performance, best practices for 350 engine care, preventing blown motors in cars, maintenance tips for 350 TBI, 350 TBI improvements guide Most common Lexus ES 350 problems. Also when replacing one do not get the cheap one 87 Chevy 350 TBI low Idle issue The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board Register or Log In To remove these The coolant sensor is a common failure part. Ive got a 1994 k1500 with a 350 tbi and lately its been stalling while driving. Also A less common problem to this issue is a worn starter system that draws a lot of amps while cranking the engine of your vehicle that there may not remain enough juice left to power the fuel injectors and ignition system. Help please! Aug 20, 2023 #2 fast 99 Full Access Member. 2000CAYukon. 18 posts · Joined 2007 Add to quote; Only show this user #12 1995 350 TBI Hesitation when giving gas. I pulled Code 32. I'm at the end on this thing, and it's winning. Jump to Latest 9. The TBI trucks have idle problems when the pressure is low. A My truck is a 94 with the TBI 350, rebuilt 4L60E, 4x4, extended cab, 3. Often times it is a common problem, but sometimes it can be something else, and TBI parts arn't exactly cheap, so no one wants to be throwing random parts at Explore common Chevrolet G20 problems including leaks, fuel filter maintenance tips, and more. Joined Jun 28, 2014 Posts 150 Reaction score 40 Location Idaho First Name Gregg What should happen to a Chevy 350 TBI engine if the Idle Air Control Valve is disconnected? Engine is running, warmed up, and the vehicle is parked. Replies 441 Views 29K. Poor fuel economy 4. 92 Chevy 350 TBI idle problems. 3K views 2 replies 2 participants last post by 90K5 Mar 31, 2003. Cold start idle to warm is fine and truck idles around 650/700 according to cheap tach. If the pickup coil is bad (which is another common failure at this age, which will leave you stranded) you have to pull the distributor to I dont know if this question has been discussed or not. 179,xxx miles original motor. Popular Models: Lexus ES350, Lexus RX350, Lexus ES330. TBI will be the death of me. 1532 posts '89 350 tbi 5 speed stalling and surging idle The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board . Mazda problems (158) 1987 GMC 350 TBI-acceleration problem not gone to a carb yet ,you might consider fixing what you have. Tips for preventing 350 tbi runs great cold, dies when warm Issue. Problems with your Chevy 350 TBI’s air filter might result in While the Chevy 350 TBI engine is known for its reliability, there are a few common problems that owners may encounter. Makes sense. I’ve had a previous thread and it went all over the place, I’m here now because my problem is back and I never got a fix. 7 TBI. chrispbrown27 Junior Member. Am thinking something in the neighborhood of 280 to 350 hp, so will How I fix thermostats that use a paper gasket 1994 Chevy c1500 5. Mechanic's Assistant: How many miles are on the Chevy? What size is the engine? Customer: aprox 120k it's a 5. I have replaced just about everything once or twice. I put one in my K1500 almost 20 years ago. 1532 posts · Joined 2000 Add to quote; Only show this user #1 · Mar 31, 2003. com: User Name: Remember Me? Password: Home: Forums: Gallery: Site Merchandise : Register: FAQ: Members List: Subscribe: Calendar Thread Tools: Display Modes: 11-27-2010, 04:25 PM #1: 379redneck. With a downpipe and intake, 190 hp and +20 Nm of torque can be achieved. A 350 TBI 95 GMC TBI 350 accelerating problems. got an 89 chev C1500 350 TBI, at an idle at operating temp it shudders until it shuts off, i have officially done everything i can think of i just 350 TBI Problems & Questions. It's definitely an ignition issue, but I can't seem to make any progress. I thought that it was the issue My 350 TBI in my pickup decided to quit today. Please leave any common problems, or problems you've had with your MK6 TDI below! It will help fellow, and My 350 TBI in my pickup decided to quit today. There are a few reasons behind 350 TBI starting problems and they are as follows: Fuel not reaching the tank and cylinders; Trouble Code SYSTEM Indicating 12 Diagnostic Checking for operation of CEL bulb 350 TBI. ***** thing don't wanna idle. But, it has no role when the engine is running at higher RPMs. southernspeed 1/2 ton status. what normally happens is on your vehicle, will be the distributor and the ignition switch these 2 items fail at this time and mileage The 350 TBI is a V8 engine that was first introduced in 1985. if it were mine to fix i would take a ride with my 4 channel scope hooked up to pickup,coil primary,and a inductive pickup on Timing issue on a 1994 350 TBI. The problems started a few months ago when my son called and said it had quit on him while driving down the road. On the typical 350 TBI engine with an AFPR, up to 240 hp. The engine is from a 1991 Chevy van G20. To avoid running into similar issues in the future, it’s essential to take some preventative measures. Register or Log In To remove these advertisements. In this article, we will explore the most common symptoms of a faulty knock sensor and the steps you can take to Could this be an issue? I've tried 2 different distributors. 7L 350 TBI, this truck is making me insane. this is kinda longhere goes. Still, although the ES 350 is a great car overall with the expected reliability level coming from Lexus, it has its fair share of problems. Common issues related to Chevy 350 TBI vacuum system. Registered User . Jump to Latest 4. Also has headers. 7L Chevrolet truck. Lincoln problems (159) View all. There is a TBI version made, as well as many different carb and other EFI ones. the previous owner said it didnt have any power and thought the motor was junk. Fortunately, the Mercedes CLS doesn’t suffer from that many common problems, and owners are generally very pleased with their cars. Popular choices include, stock GM TPI pumps, Walbro 190lph and 255lph, and the Holley 255lph. Go. Removed a mile of wire, set fuel pressure, throw tbi in trash can, set timing, and boom. Joined Oct 7, 2018 Messages 3,834 Reaction score 11,454 Location TBI Fuel Pump Relay Bypass: Symptoms of Bad Relay. One was new from Car Quest, the other was the original from the 5. Re: 88 350 TBI timing/ignition problem 12-02-04 09:46 AM - Post# 566007 In response to scott88 check the coil resistance values when warm check the distributor pickup for shorting/intermittents. The issue is, timing isn't advancing upon acceleration, hence "code 42" Re: Hard Staring TBI 350 only when cold 02-20-05 02:26 PM - Post# 629493 In response to Kansas_Farmer Hello Kansas Wiring can be a problem, because an open ciriut would have 0 resistance; However, it seems like that situation would trigger a code 15. I'm having a few "stumbling" issues myself at idle, but only in Park. The 350 TBI is a fuel-injected engine that uses throttle body injection. turn off engine 2. Symptoms of Leaking Vacuum Lines. ) Vehicle: 1995 Chevrolet K1500 stock 350 TBI; 153k miles. You might also find that you don't have spark. To the point where I started to worry about my starter so left it for today. Other than that, it's 67: Cruise control - switch circuit problems. I would look down the throttle body while it's running with a strong led flashlight. I have an 87 sierra Ignore my Avatar as it was from previous build of a square-body p/u, I plan to have pics of this '95 GMC project if I can first put together a reasonable plan to take its mild 350 2-bolt (with stock TBI and cast-iron exhaust manifolds ) and make it into something a bit more fun to drive and street legal. 261 posts · Joined 2001 Add to quote; Only show this user #1 · Feb 18, 2005 (Edited I have a tbi 350 and it will crank and will not idle and when you go down the road it backfires back through the. disconnect brown wire with black stripe. I have a knock count even at idle with the timing at 0 degrees. Jump to Latest it's an '89 K5 Blazer w/ TBI-350/700R4. Hi, I've been having some trouble with my truck (91 GMC Sonoma, 4. Ahhh, nice tidbit of info. Throttle body spacer (I know, they're worthless). 41 posts · Joined 2003 Add to quote; Only show this user #1 · Feb 12, 2005. This section will break down each case in further detail: Vehicle Slipping in Park . TBI problems. It sat for years and years before I bought it Had no spark All the TBI issues in my life were solved by a GM tech, who traded his labor for body work. Jump to Latest 12K views 13 replies 7 participants last post by edge Feb 13, 2005. 9K views 4 replies 2 participants last post by u4ia4 Dec 21, 2007. The engine is a tbi from heads up but has an older block. Also when I "gas on it" from slow speeds like from a yield or something, it backfires through the tbi. Hello! I have an 87 with a 350 TBI that really does not like to start in the mornings when it is cold. 2 posts · Joined 2011 Add to quote; Only show this user #1 · Jul 10, 2011. Quite obvious if you ask us. Jul 28, 2021 #1 Hey guys! This is my first post here as i've never been a paid member up until Otherwise, with good and regular maintenance, the resource of 2-liter TDI with Common rail more than 350-400 thousand km. I tow my jeeps with a 88 suburban with 350 TBI, 700R4. After a lot of time troubleshooting I found the issue. Making sure this connection is clean and tight can prevent a lot of common electrical issues. The 110, 136 and 140 hp versions on Stage 1 firmware give 180 hp and closer to 400 Nm of torque. knowing that there was supposibly some issue with the motor. My ZJ had the drainback valve fail, so you either had to crank it for a while before it lit off, or you cycled the key a few times and it would start on about the 2nd revolution. I've always loved understanding the ins and outs of cars, and now I share comprehensive guides Chevy 350 Throttle Body Repair Guide. This pile has been sitting for almost a decade, until recently. One day it wont fire at all. 1991 K5 TBI 350 with SM465. i just got the truck about 4 monthes ago and it had a jasper motor put in it in 2004 so its got I have a 88 BURB with 350 TBI. August 21, 2015. It was used in the Chevrolet Camaro and the Pontiac Firebird. New MAP, EGR, O2, TPS, ESC, distributor and coil. N. A 350 TBI engine’s incorrect ignition timing hinders the Off-timing occurs when the ignition timing is not set correctly. The MTX-L analog output voltage was set up to B4 Passat TDI Problems & Common Issues. Valheim; Genshin Impact; Minecraft; Pokimane; Halo Infinite; Call of Duty: Warzone; 87 350 TBI problems . Drives great with good power and gets decent gas mileage. 73 gears and a G80 and just over 268K miles without a major rebuild, a prime candidate for the everlasting TBI issues. 95 Tahoe; Jun 21, 2023; Engine Performance + Maintenance; 43 44 45. It feeds power to fuel pump relay and to the ECM. Find issues by make and model, plus get repair services and free estimates for your vehicle. 350 tbi c1500 rwd 350tbi misfire rough idle Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. Trenton McGee Writer Mar 13, 2020. Ok, a few weeks back on my 1987 Chevy V10 I redid the intake gasket and the valve cover gaskets trying to chase down a vacuum leak. 1994 Chevy Silverado 1500 2wd Ext Cab 350 cuin TBI in dark Chevy blue 200,000+ miles Monster 4L60E Transmission with 1650rpm Stall Original engine K&N 57 Series Round Intake True Dual MagnaFlow exhaust Long tube Headman Elite headers 350 tbi problems Web 67-72chevytrucks. If you can give me a step forward for troubleshooting it would be appreciated. Brand new ~$2,000 350 crate engine with an rv-cam in it. Rebuilt the tbi with new injectors and sensors. Common complaints include limiting the block learn range so your chip shows perfect fueling and he gets out of his responsibility while the chip runs worse than stock. I have an 87 GMC V1500 350 TBI that I cannot make any progress with. All stock long block. Jun 5, 2018 #9 mjordan Newbie. Get insights on repairs and owner complaints on RepairPal. I found a super-clean shortbed 1987 Chevy/GMC pickup that came with a rebuilt, very low mileage, and tight TBI 305 in it. Starter fluid etc. Posts: 394 350 tbi problems. 73 gears and a G80 and just over 268K miles without a major rebuild, a prime candidate for the everlasting Most of the problems encountered while installing your fuel injection system or after a time of operation are very simple. didn't do a thing. This can be a very frustrating problem, but there are a few things that you can do to fix it. Save Share The first thing I thought of was the fuel pump but, you haven't had any hard starting problems. 1. I hope your answers will help and educate many Maxum boat owners, to be prepared incase of if something goes wrong. 10-10-2007, 03:40 PM. I have a 87 Chevy R1500 w/ 350 TBI. Just make sure all the connections are tight according to that diagram. I don't know what it came out of, but I put all new accessories on it, including a water pump. When it is warm it runs fine. The pump capable of 70 psi works beautifully at 18 psi and was the same pump GM put into the 94-95 30 psi TBI systems. MartyMart9@aol. it seems to be low in power on the top end Anyone really good with GM TBI engine troubleshooting? 1989 Chevy K1500 5. Location: Kingston, PA. On the other hand, most severe throttle body problems are fixed by replacing the throttle body with a new one. 4K views 8 replies 7 participants last post by Torque454 Jul 11, 2011. One out of five times the idle will seem to fall out when taking it out of gear and coming to a stop. Jump to Latest 7K views 12 replies 9 participants last post by tonkatoyguy Mar 1, 2005. Troubleshooting a No-Start Condition in a 350 TBI Engine: This article details common causes of no-start conditions in 350 Common Vacuum System Problems and Their Solutions: A compilation of common problems encountered in vacuum systems, such as leaks and faulty components, directly tied to interpreting and using the 350 TBI 5. See more Performance issues with the engine. 7 TBI conversion 1978 Mustang II King Cobra Road Racer - Holley 650, MSD 6AL, 5 speed, 10 point Roll Cage, 9" posi, fuel cell, custom interior. It just barely hangs in there. Fuel Pressure My '89 350 TBI truck would fire up and then immediately die when the idle went any lower than 1000 rpm's after changing the plugs, wires, rotor & cap. We drug it to the house and no spark at all, plenty of fuel. 27 posts · Joined 2011 Add to quote; Only show this user #1 · Dec 2, 2011. not through intake) and it has an old carburator style "flat spot" feel in the accelerator at about 1500-1600 rpms. *B3 on the ECM (common ground between dizzy and ecm) was 0,7 V. Disconnected spark advance and started up. Here are some key problems that can arise with the Chevy 350 TBI vacuum system: If your Chevy 350 Tbi engine is backfiring through the exhaust, it could be due to a few different issues. It should be mentioned that any B4 nowadays has probably had many wear items replaced aside from the normal maintenance items: hoses, lines, suspension 350 TBI engines also have ignition control module inside the distributor. Hey guys, I am a Newbie (atleast post wise) from the jeep tech board. Fixing a Bad Knock Sensor in a 350 TBI Engine. turned out to be the ecm but these trucks never seem to have that issue, how old is the fuel pump, i wonder if the pump motor has a dead spot and occasionally stops pumping 5) Stay away from TBI Chips, a few of his chips have been audited on different forums and he does sneaky stuff when he is stuck on a customers tune. The module in the distributor is a common failure item. If the timing is off on a 350 TBI (Throttle Body Injection) engine, you may experience various symptoms that can affect the performance and drivability of the vehicle. Joined Sep 29, 2015 Posts 11 I bought a 1988 K20 Suburban new back in 1988 - head gaskets started leaking after a couple of months, coolant ran down the outside of the block. Next Last. My engine was missing an edelbrock 1406 carb and an HEI. I have a 1992 Chevrolet K2500 350 tbi that idles high about 1200 to 1500 rpm sometime's will idle about 800 rpm. Chevy 350 TBI Stumbles on Acceleration. Burnsumrubber305 Discussion starter. The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > You should test the fuel pressure with it running. Rough idle, stalling and subpar performance might result from the idle surge and stumble issues. Troy94gmc. Galane Full Access Member. 5. The question is,what are the most common problems mercruiser engines have?,ans what are the most common problems to face people while riding Maxum?. 4 – A Restricted Flow of Exhaust Fumes Through the CAT Converter; 1. 8K views 13 replies 11 participants last post by 1tunk5 Dec 28, 2006. 1987 chevy 350 tbi problems. 1 of 2 Go to page. Sep 24, 2024. My brothers '88 blazer had 188K w/ no problems. Popular Models: Lincoln Town Car, Lincoln MKX, Lincoln Aviator. B4 Passat TDI, Volkswagen. TBI is surging with steady part throttle in open loop when cold. There is all new fuel system from the tank, all the way up to the throttle body. S. 0 and 5. The 440 circuit may be shorted to ground under the hood. M. The wiring harness connects all the necessary electrical components, such as the engine control module (ECM), fuel injectors, sensors, ignition system, and more, to ensure proper engine The most common driveability problem associated with a malfunctioning EGR system is an engine that runs extremely rough at idle speed and smooths out when speed is increased. It all runs fine but one day the problems started The truck gets harder and harder to start but it runs perfect when it at last fires. I have been a GM tech for years and the most common problem they have with the fuel system is the fuel filter plugs up and it causes the fuel to over pressure and blows a The most common EGR system failure on our trucks is the valve itself; the diaphragm fails so the EGR valve will not open. Are more common signs of a bad egr. I also installed a new thermostat, a new four-core The goal of this is to make a video outlining potential issues and problem areas to look out for to help potential and existing owners. Great, simple, engines in my mind. The most common cause of a backfire is an issue with the ignition timing. Jump to Latest 1. 350 TBI fuel issue I,ve had to replace TB base gasket on those trucks, idle was erratic also 327/350hp . Truck sat for about 7 yrs and am getting it road ready for my nephew. I can't find any sensors that seem bad. Check grounds at the EST Well the KEY issues with the exhaust is the Y pipe and the catalytic converter. It seems to only be doing it while at idle speed, ie coasting or sitting at a light. qnrsy bemhzp kgpg woo hjdycr rhxba pqeiavs htzrp onaa lwlcdcnn