350 tbi surging idle when cold After that everything is perfect. Check the throttle position sensor. 8 Atlas II transplant last Sunday. Cap & Rotor & Fuel Filter. If I cold start it and give gas to keep the idle above 1500 until the engine is warm then there is no problem. Dec 15, 2022 · I have a 95 k1500 with the 350 tbi. Cold high idle then stall and sometimes TB backfire Feb 9, 2016 · My 350 TBI is running very rough. I've seen it cause the computer to run the idle air control valve in and out causing incredible erratic RPMs. Eventually flattens out and stops but returns if I blip the throttle. Even block heaters only help a little bit during the really bad cold snaps. 7 tbi with 115,000 miles on it. The truck runs and drives great, engine is a jasper reman with 30k and runs like a top. ) Map Sensor 10. The engine is a tbi from heads up but has an older block. Also, when you idle the ammount of air and fuel mix is small, less air = less fuel needed for lower engine speed. 94 and 95 was the higher fuel pressure motors Jan 24, 2025 · 91 c2500, 5. Alaskan1. 58 volts, if not you will need to Jun 12, 2011 · Once again, symptom is cold idle too low and may stall if started and moved around too quickly. Also, stalls with A/C or defrost whether engine is cold or warm. I've driven this truck around for months with no issues, suddenly one cold morning it started up fine but stuttered itself to death and never started again. That’s open loop. It runs great, slight surge sometimes at idle and like I said when cruising. ie A/C lights on etc. If I had to guess, I'd say it's a dirty throttle body, or possibly injecters. Didnt change a thing. I have replaced the MAP Apr 13, 2010 · This is causing it to slam into gear and run like ****. That’s closed loop. Jan 2, 2004 · If it fails it can cause rough idle due to incorrect fueling from the ECM due to the sensor giving incorrect data. With its sleek design, powerful performance, and advanced features, this vehicle offers a driving experience If you’re in the market for a new car, the Lexus RX 350 is a popular choice. Negatives are runs very rich at idle, occasional backfire at idle and low on power. Apr 3, 2007 · A bad MAP sensor can cause a computer to flake out. With its impressive engine options and advanced technology, this vehicle is designed to deli If you’re in the market for a used engine, specifically a 350 used engine, it’s crucial to consider the warranty that comes with your purchase. Its the factory 350 bored 60 over with 98 vortec heads a slight came upgrade and stock TBI. I thought it was my intake manifold gaskets leaking and causing Sep 25, 2019 · Hi everyone, I recently put a new long-block 350 in my '87 Chevy Suburban V20. It helps regulate the air-fuel mixture during cold starts, ensuring pr The number one cause for high idle is an imbalance in air pressure. 5 eng. Voila it ran beautifully! Today I replaced my O2 sensor and both CV axles. While cold with the idle still on the high side it seems smooth and normal. It's been having a Forums. Feb 6, 2015 · Ok here is my issue I have a 1993 k1500 with a 5. -changed fuel filter. 8K views 7 replies 2 participants last post by Warden Oct 11, 2023 Feb 18, 2022 · 1995 Fleetside 5. I just hadn’t messed with one in over 15 years. The surge is like a whup-whup-whup-whup until I add throttle and rev it out. Are there vacuum lines under the dash for the A/C. What are the highest "possibles" for this? Some kind of sensor? 1994 GMC K1500 with a 5. I am 1994 MB 300 idle surges when cold Apr 3, 2021 · Ive been working on my pops suburban. A 350 TBI idles up and down at random is one of the most common. especially if it runs good cold, and then dies once it warms up. Data logged, on the rough idle start I have noticed a couple things, the IAC is almost closed during the bad idle and when it begins to open the idle smooth out. Nov 22, 2017 · That’s correct. Jan 29, 2012 · 350 TBI surging idle. It will correct itself after about 5 seconds, can usually correct it a little quicker by revving. It runs great never hesitates or dies it will idle high at the stop light and then go to low idle but surges. If idle speed is too low adjust stop screw until idle speed is 600-700 RPM. BLM is down around 100. Jan 3, 2025 · If it is really cold outside warm the throttle body up with with a heat gun. 91SilveradoZ71; Jan 23 May 12, 2015 · The issue I am seeing is that when I let off of the gas pedal and coast, I can feel the engine surging as it's decelerating with the transmission in gear. Feb 15, 2016 · Cold high idle then stall and sometimes TB backfire. Tightened loose spark plug 5. I have to crank the motor for around 10-15 seconds it will try to start. Mile truck maybe 160* when i started the truck the idle dropped to 500the in park instantly and stumbled when put in gear. If doing so makes th Cars idling rough at stops can have many causes, including damaged sparkplugs, improperly installed sparkplugs or damage to the car’s fuel injector, carburetor, vacuum hoses or ign Planning an overdue beach day, or want to spend your summer days soaking up the sun on your patio? We’ve got a fun summer activity to add to your schedule: idle games. The truck runs well above idle, never stalls at idle but idles rough. I will go to neutral after 3rd until I come to a stop, then the RPM will drop suddenly, almost die, then come back to normal idle. Feb 18, 2016 · Had trouble starting when cold, so I took it to Oreilly's and swapped the battery after they confirmed it was bad. I got rid of the idle surge, it was the heat stove flapper in the air cleaner being stuck open. Rich Jan 4, 2011 · When the engine is cold, the problem is not there, but I also notice the idle is about 800RPM on the tach. One of the key features of this vehicle is its ability to have its seats If you own a Ford Transit 350 XLT, you know how versatile and reliable it is as a work vehicle. Fri, Nov 3, 2006 5:26 PM. i replaced o2 sensor again and tested it, it reads good May 23, 2016 · Rough Idle - Chevy 350 TBI. Mar 2, 2018 · Now, when engine starts cold, it idles very rough up and down between 600 and 1200 RPM and almost dies. The idle will be ok other then a slight shutter here and there but under any throttle the RPM will surge up and down especially if the truck is in gear, this is making it undrivable. A warranty acts as a safety net, pro For 2015 models, the maximum towing capacity of a Ford F-350 ranges from 12,100 pounds to 26,500 pounds, depending on the configuration of the vehicle and the trailer. I cleaned the iac port and Jan 13, 2022 · 1994 Chevy c1500 5. When it is warm it runs fine. One of the best places to start Are you in the market for a pre-owned RX 350? This luxurious SUV is known for its stylish design, comfortable interior, and smooth performance. Start engine, adjust the base idle screw on the throttle plate until about 500 rpms is reached then verify the TPS voltage is at . Yesterday I swapped the entire tbi with a known running truck that did not surge at idle, My truck still surged. I have a lawn business and a trailer I have to pull on friday :eyecrzy: Good news is I can use my buddys truck but we cannot figure out what is causing it to idle high? Cold start it will idle normally for a minute (800 rpms) then it will jump up to 1200 and stay there. Jun 2, 2008 · It basically almost dies out, and then surges back to life (probably a little higher than normal idle), then repeats continuously until you apply some throttle. -changed coolant temperature sensor, and verified proper resistance, good. Usually misfires occur when there is no spark, the air/fuel mixture is out of balance or the engine is According to About. Nov 28, 2022 · It seems like it is hunting for idle, surging anywhere from 300-800 and almost stalling out, the surges will sometimes be small and other times be one the extreme of that range, when driving there is no issues other then at complete stops where within a couple seconds of idling it will start hunting again. I has so far replaced distributor, cap, rotor, plugs, wires, cts, iac, o2 sensor, map sensor and tps. Feb 4, 2012 · 89 Throttle body 350 rough idle and hesitation Jump to Latest 45K views 35 replies 11 participants last post by EagleMark Feb 11, 2012 1987 tbi 350 manual trans surging idle and at 3200 rpm the truck runs great. If those don't take care of the problem, get an ODB scan tool and watch what the engine is doing when it surges - especially the oxygen sensor output, injector dwell times and ignition timing (bring along a knowledgeable passenger to watch the tool while you drive, or get someone else to drive). Stock fuel pressure should be around 9-13 PSI for GM TBI. when I put it in gear it bogs down and will sometimes stall then the idle comes up a little bit and continues to run rough. I bought a fuel pressure test gauge. Vehicle opti If you’re in the market for a pre-owned RX 350, you’re not alone. I'm wondering if that should be an area to check? Nov 15, 2021 · 350 TBI surging idle. 7 350 TBI. When a car is stopped at a red light or turned o Python is a popular programming language known for its simplicity and versatility. Sometimes it will sputter a bit and the RPMs will drop but it catches itself. If it sits for more than a few hours when you start it the idle hunts from about 600-1700 rpm. It idles around 1500rpms when I start it up in the morning. You should check the fuel pump pressure when cold and when warm. Hose barb was broken) 3. It's intent is to set "minimum air". EGR solenoid replaced (Hose was connected to vent. Inspect the idle speed actuator-- It could be loose or faulty. Nov 3, 2006 · 1994 z71,350 TBI surging idle when cold. It's always when I'm half throttle at cruising speeds it will surge 2-300 rpms and it's annoying as fuck. Surges at idle, sometimes dies. Still stumbles. Jun 5, 2008 · Hmm i'm having sort of the same issuies with my 91 truggy. May 11, 2007 · '91 TBI 350, starts and runs fine when cold. com, there are several reasons vehicles idle low. Renowned for its comfort, advanced features, and smooth performance, the Lexus R A concussion is a type of traumatic brain injury (TBI). Leaking intake gasket (Leaking oil from the valley) 2. This could explain your surging idle. Revving seems normal. Feb 8, 2025. This morning I disconnected the evap canister from the TB and plugged the vacuum port. Apr 3, 2023 · rough idle tbi Jump to Latest 2. Check the meatloaf’s temperature while it is still in the oven by inserting the thermometer into the center When it comes to luxury SUVs, few can rival the elegance and sophistication of the Mercedes GLE 350. Oct 15, 2006 · Surging or "hunting" idle speed: You can check for this by eliminating if the IAC control is at fault or not. Give it a little more pedal and it takes off like a bat outa hell. Apr 15, 2021 · Alrighty, so I have a 1995 k2500 Silverado with 350 tbi. Chevy small-block engines If you’re in the market for a used engine, it’s important to tread carefully. ok I have seen lots of topics on this issue and I have tried every solution i could find but nothing has worked so i turn to you all. This is a cold start in the summer time. 1: Runs fine at high speeds, but I can feel the engine surge a bit at 25 MPH, and at 5 MPH it is very noticable ! If I get out and disconnect the EGR Vacuum Solenoid power connector, problem gone. Then let it set for a couple seconds crank on it some more usually give it throttle. Nov 19, 2021 · Does anyone know about 350 TBI engines? I have a 1987 V10 with the original 350 TBI. ” But what exactly does that mean? In this ultimate gu There are several variations of the Chevy 350 engine that come with different horsepower ratings. Cold high idle then stall Nov 26, 2021 · I figure this has been discussed before but I haven’t found a definite answer, I’ve got a 1987 Chevrolet V20 with a 350 tbi paired to a sm465, and it idles around 2000 on a cold start and comes down to around 1200-1400, I’ve never got it to get below 1000. 93 Blazer 5. In recent years, service do The choke on a Mercruiser 350 Magnum engine plays a crucial role in starting and running the engine smoothly. . No big deal, I figured. Bone stock 88 TBI, set you timing to zero (with engine @ regular warmed up temps). The only issue I have now is that i have idle surges Feb 6, 2017 · It always starts after a few cranks and usually it idles high for a few seconds before it levels off to a normal idle (seems normal). Typically 2 problems. I replaced and tested the Engine coolant temp sensor New EGR and solenoid. Also the idle The truck starts fine when cold or hot. I put everything from the old engine on it except I replaced the factory intake manifold with an Edelbrock TBI Performer, replaced the EGR valve, and replaced the radiator and installed electric fans. By jumping a 10K (10,000) ohm resistor between ALDL terminals "A" and "B", the ecm will fix the IAC position, ignoring the internal timer, and be forced to go into closed loop, and set the idle - in N or P idle rpm slowly drops to 200-300 rpm then engine "catches" up and rpm shoots back up to normal idle and continues surging. What people like about TBI is its simplicity with only a few sensors is also one of its biggest downfalls. I have done all I can think of to this point and need some others opinions Re: 89 TBI 350 Rough Surging Idle, Cutting Out/Stumbling on Acceleration « Reply #5 on: June 18, 2023, 09:31:28 AM » Keep in mind that you have an 89 and it might be possible that your fuel lines/hoses and tank could have some contamination and rust that would cause problems. While finding information on how to fix a stock TBI issue is challenging, countless other drivers have faced similar issues. When I turn the engine off and cycle the ignition and start it, it will start like normal, rev up a bit and settle into a high idle. One out of five times the idle will seem to fall out when taking it out of gear and coming to a stop. Surging idle on cold start Jan 23, 2021 · Still fighting this thing. I can hear pinging at idle, seems to get worse as engine warms up. Everything i have read points to the IAC valve. Idle. Can't see any leaks around the injectors with the key on It still has its surging in gear, park idle its smoother. It will spit fuel out of the tail pipe. All went well except I experienced the engine surging at idle. While buying a used engine can be a cost-effective solution, there are common mistakes that many buyer Python is a popular programming language known for its simplicity and versatility. Already checked/changed Did a compression test, all cylinders and they were consistent at 190psi. 7L 350. The problem is idling in gear. The motor is from an 88 1 ton pickup and went into a 89 half ton Suburban that had a tbi 350. Re: high idle with tbi 350 08-23-06 05:35 PM - Post# 989935 In response to bowtie-badboy well i tryed the reset thing and i dont think it worked cause i herd no sounds . 0L AT. While this luxury SUV is known for its reliability and comfort, it can come with a hefty price tag. 3 "Vortec" | Spectre "Cold Air Intake" | TransDapt TBS | Hypertech 30005 Tune | 2005 Chevy Tail Lights | Denali headlights | Grill Mounted Fog Lights | AWS Bug Shield | 265/70/16 Futura Scramblers | Boss HD Speakers | 2005 Overhead Console | Flowmaster Super 40 mufflers 2N1O | Mostly stock-ish Oct 14, 2023 · When I first start the truck it runs perfect however it quickly develops issues. That is the positives. Runs fine when warm but has a hesitation that will almost stall the truck just as you crack the throttle. I have a little update. So, the truck is a 92 k1500, has 20,000 miles on the new GM crate 350, new throttle body, rebuild trans about same time eng was put in. To test the problem, the driver presses down on the gas peddle. Get or borrow a fuel injection fuel pressure gauge (parts stores have loaner programs). I just replaced the Idle Air Control valve because i was told that could be it. Had this problem with my 95 Tahoe 350 at one point and the failed coolant sensor ended up being the issue. The TBI engine has a fixed fuel map and a set high idle speed that stays active during warm up. 91SilveradoZ71; Jan 23, 2025; Engine Performance + Maintenance; Replies 4 Views 491. May 23, 2016 · Anyway, I've had an erratic idle problem with our '89 K1500 5 speed since it had the bad motor in it. A certified pre-owned . -new air filter. Idle surges between roughly 575 and 850 rpm and runs rich. 91SilveradoZ71; Jan 23, 2025; Engine Apr 5, 2022 · Howdy, So I recently bought an 87' GMC SIERRA short box with the 350 TBI and When I start it, it surges bad and trys to die, and then begins to idle better but still not right it sounds like a misfire. ) Idle Air Controller 8. 7L rebuild with a new Jegs TBI, new high-pressure fuel pump and cold air induction. 6. Additionally, some cars have a fan clutch tha Python is a popular programming language known for its simplicity and versatility. An idle air valve is important for maintaining correct idl If a car shakes when it is idling, the cause is usually something happening with the engine, such as needing new spark plugs. It is not intended to adjust idle speed, per-say. 350 TBI surging idle Jan 22, 2025 · Good morning I’m new to the forum and don’t know if this is the right place for this but I’ve been having a problem with my 91 Silverado 1500 with the 350 tbi. The DRW models typically weigh more than the SRW models, and cars The Ford Transit 350 XLT is a versatile and spacious vehicle that can be customized to suit various needs. If I’m rolling to a stop and put it in Apr 16, 2010 · Too much EGR flow at idle, cruise or during cold operation may result in the engine stalling after cold start, the engine stalling at idle after deceleration, vehicle surge during cruise and rough idle. 91SilveradoZ71; Jan 23, 2025; Engine Performance + Maintenance; Replies 4 Views 423. You will need to make sure whatever fuel pressure tester you get has an adapter that goes in between the fuel inlet on the TBI and the fuel line. However, buying a brand new car can be quite expensive. Idle surge or idle hunting and high idle. 91SilveradoZ71; Jan 23, 2025; Engine Performance + Maintenance Nov 8, 2009 · 7. It is widely used in various fields, from web development to data analysis. When it is started cold, the idle surges from between 500-1500 until it is warmed up or you are driving down the road. Nov 15, 2021 · Now the temperature is dropping, and on cold morning idle surges badly for about two minutes, then smoothes out and runs like normal. Jun 15, 2004 · If idle speed is above 800 RPM check for vacuum leaks and check adjustment of throttle stop screw on throttle body. Especially since you unplug the spark advance Oct 19, 2012 · I have a 92 350 TBI she is hard starting when its cold. I have about 3k miles on a Chevy 5. I doubt you have a fuel delivery problem. To make the most out Are you in the market for a new motorcycle that combines style, performance, and versatility? Look no further than the Honda ADV 350. Step inside the Mercedes GLE 350, and you’ll immediately be greeted by an ambia When it comes to luxury SUVs, the Lexus RX 350 has always been a top contender. Nov 2, 2010 · '89 350 tbi 5 speed stalling and surging idle The 1988 The IAC (and computer) is what gives the engine a “fast idle” speed when started cold. -checked Idle Air Controller, good. 1987 Chevrolet V20 350 TBI Frankenstein engine and sm465 trans. I few weeks ago this weird problem came up, when I go to start it, it would fire then die. I have replaced every sensor, wires, Apr 14, 2024 · 350 TBI surging idle. It seemed to be struggling with idle so I turned the connector for my IAC 180 degrees and tried again. Coolant temp sensors are pretty common failures on tbi Chevies. Apr 9, 2010 · 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. Spark plugs are black and sooty. An engine idle speed is set by the manufacturing in order to ensure the When a car sputters as it idles, this means the car is either not getting enough power or fuel. This was quite bothersome descending hills in low range/first. I have repaired a few things: 1. My 95 Tahoe surges a little at idle. I have to turn it over several times in order to get it to start than I have to feather the gas alot in order to keep it running after a few minutes it idles on its own really low idle. It usually happens when you hit your head or get hit in the head. Jun 11, 2024 · Hard cold start, loping is worse than ever. You may have problems with different brain functions like If you’re in the market for a luxurious and reliable vehicle, the Lexus RX 350 may be on your radar. The tbi has been cleaned and everything replaced to include the TPS. When it's stone cold, it will idle fine for about 15 minutes till it warms up and May 2, 2007 · 383 Stroker TBI from Motorcrate Edelbrock Performer TBI Intake with 50mm Bores 50mm Throttle Body 90lb 454 Injectors 18 PSI Fuel Regulator Walbro Fuel Pump Custom Chip from TBIChips Problem: Idle Surge, sometimes from 400RPM to 1200 and sometimes from 800 to 900. If this truck has the electronic transmission like a 4l60e or 4l80e the faulty coolant or tps reading will definitely affect the transmission. If you rev it Customer complaint bad gas mileage and a surging condition at idle, sometimes. Someday I’ll do it just to clean it up. - when surging, If I hold throttle steady ie 2000 rpm in park or neutral tach will surge up and down a bit. Jun 9, 2009 · A dirty air filter, clogged or worn PCV valve or clogged EGR valve can cause engine surging. Also when the truck is about to die the vacuum drops way down (14-15). shut it off and jumper A and B terminals in the ALDL (connector under dash) then turn on key and go under hood and unplug the Idle Air control. -new gaskets for TBI. Jun 24, 2024 · Even after replacing all these sensors my truck recently started having surging idle and low idle (around 250-300 rpm), at first my o2 sensor was the culprit but then i replaced it and it worked great but i parked it for about a week, started it after and then got the surging and low idle. It goes away after I drive it for a minute or it warms up to closed loop. '89 Chevy 1/2 ton 350/auto TBI; Surges at idle, stumbles on acceleration (worse when cold), and starter spins waaay too long before engine starts. Make sure you are running a clean air filter as well. Nov 29, 2004 · TBI is surging with steady part throttle in open loop when cold. Once the engine temp gets above ~100F, the computer switches over to the O2 sensor to manage the fuel mix. Inspect the Idle Air Control Valve-- Damaged, Loose, or Faulty Idle Air Control Valves will cause rough idle. It's pretty much always there, I can get it to behave a bit once I'm moving but that's really only between 20 and 40 mph and that's by hitting the sweet spots. Known for its reliability, comfort, and elegant design, this vehicle has become a favorit When it comes to luxury cars, the Lexus brand has always been a top contender. Start the engine and allow it to warm up. - having accessories running makes the surging more intense. Aug 27, 2009 · The only adjustment for "idle air" is a screw in the front side of the throttle body. This adventure scooter has been making waves i The 2023 Lexus RX 350 is a luxury SUV that offers a powerful and efficient performance. Oct 10, 2012 · I have a 95 Tahoe with the 350 TBI and it seems to have an idle issue. Truck would want to idle @600-650 RPM when warmed up but often while just sitting there already idling at 600-650 it would start to idle up to almost 1,500 rpm at times. 7L TBI, I've replaced the Timing Chain & Gears, IAC valve, TPS, MAP, EGR & Solenoid, ES Module & Knock Sensor, ECS, Ignition Module, Plugs & Wires, Dist. With its sleek design, cutting-edge technology, and impressive performance, it’s no wonder why this Are you in the market for a luxurious and reliable SUV? Look no further than the used Lexus RX 350. I triple checked timing, 1 at tdc, balancer on 0, rotor pointed at 1. It seems that every ten seconds or so like clock work the idle drops 1-200rpm then rises up to about 900rpm. 7 TBI, 214k miles. 7 tbi when at idle it has a low to the idle. You could be in a situation where the gasket seals a little better when warm. 91SilveradoZ71; Jan 23, 2025; Engine Performance + Maintenance; Replies 4 Views 445. Normally at idle it’s around 700 at cold start in park and it drops down to about 400 in gear and will sometimes drop and rise and even die. But A 4-pound meatloaf needs to bake at 350 F for two hours and 40 minutes. When driven for any length of time I get a code 43. Once warm, it will die at stop signs/light, stumble badly when accelerating, and surge from a rough low idle to a fast idle at times. 93 eagle vision 3. Connected it at the back of the TBI and then again before the fuel filter; same results from both locations. I assume this acts like a choke and needs to be closed like this. Nov 25, 2016 · This usually causes an extremely rich mixture or flooding and no starts. 5. It will die occasionally but most of the time it manages to stay running. Dec 16, 2008 · and came up with this. The spark plugs provide an electrical arc that ignites A car or car’s engine may vibrate while idling for various reasons, including that the motor or transmission mounts have a problem. this thing is surging and its always a 50/50 chance of it stalling out when ever I come to a stop or get into reverse, it has just under 238k on the engine and its only does this at idle when i have my foot on the gas pedal it doesn't surge at all but once it idles or its just sitting Oct 14, 2023 · 350 TBI surging idle. New MAP sensor New IAC New TPS Replaced all fuel lines, new pump, rebuilt throttle body (with gaskets) new Jul 9, 2022 · 1995 GMC C1500 350 tbi with a rebuilt 4l60e 275k- has been idling really rough in park surging and ultimately stalling after a few minutes usually with the ac off. Has ran rough for several years. Once the engine gets to around 110-120 the rough idle/RPM hunting behavior begins. Is your EGR valve closing all the way? Usually the computer can compensate for a partially open EGR valve but not with a flaky MAP sensor. The Lexus RX 350 is a popular choice among luxury SUV enthusiasts, known for its blend of style, comfort, and perf When it comes to luxury SUVs, the Mercedes GLE 350 is a true standout. The Chevy stock 350 motor had a huge decr When it comes to luxury vehicles, the Lexus RX 350 is one of the most popular models on the market. If you let off the throttle quickly the truck will nearly or will stall. Cold start idle to warm is fine and truck idles around 650/700 according to cheap tach. When it gets to operating temperature and the idle drops more it is more noticeable. I have a 1991 c1500 5. 4. Rough idle, stalling and subpar performance might result from the idle surge and stumble issues. When the engine is hot my problem starts. 7L Idle is surging when warm. I knew it was zero. It flacuates between 350 and 1000 rpm. It provides a convenient interface for writing and executing Pyt Idle speeds vary from car to car, but for a passenger car, typical idle speeds are between 500 and 900 rpm. Problem: excessive corrosion internally on the Engine Coolant Temperature Sens Traumatic Brain Injury (TBI) can significantly impact an individual’s quality of life, leading to various physical, emotional, and cognitive challenges. It's a 350 TBI. surging/ pulsing idle. so i un screwed the IAC from the throttle body and jumped the pins (i think they were the right ones) and it didnt move at all, but my check engine light kept flashing one pause then twice , over and over so i dont know what Jan 5, 2023 · I am experiencing rough / surging idle, especially once coolant temp reaches approx 110 degrees. It is widely used in various industries, including web development, data analysis, and artificial The primary theme of “Tears, Idle Tears” by Elizabeth Bowen is a boy’s coming of age through acceptance of emotions. this is a know problem spot when the idle is erratic or unstable. Roof Rack Systems: Maximize the cargo-carrying capabilities of your Ford Transit 350 The Lexus ES 350 Sport is a luxury sedan that combines elegance, comfort, and impressive performance. Amazing how reliable TBI’s are. But I’m still getting 4 or 5 stumbles when it’s on fast idle 1200-1250rpm. An engine that is idling too high may be caused by a faulty idle air control motor valve that has completely fai There are a number of reasons why an engine might misfire while it is idling. Gaming doesn Idle air control valves can be tested for resistance, mechanical function and valve triggering with a digital multimeter. 91SilveradoZ71; Jan 18, 2010 · I have a 91 Chevy 350 TBI in my truck. These engines are designed to provide maximum p When it comes to luxury vehicles, the Lexus RX 350 is one of the most popular models. Idle does not kick up like other vehicles when the A/C is applied. You can feel the truck lurch foward as the idle May 15, 2018 · My mechanic did the following and the stumble at idle still has not gone away. Leaking vacuum hoses replaced 4. Jan 3, 2022 · I'm working on a 1991 LD2500 with a 350. Common reasons include vacuum leaks, carburetor problems, ignition issues, damaged power circuits and dirty fue Python IDLE is an integrated development environment (IDE) that comes bundled with the Python programming language. Replaced fuel filter Here Jan 5, 2022 · 350 Tbi hesitation when accelerating. Unplug the MAP Sensor and the problem goes away, I replaced the MAP Sensor with one from Autozone, and that didn't fix the problem. Nov 24, 2010 · So, when its idleing cold its got the fuel to compensate for the extra air leaking in. I keep thinking that I should rebuild a 25 year old TBI on principle but it runs so well I hate to mess with it. Temp sensor, map, and tps all appear functional, checked with scan tool. Jan 14, 2010 · 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 Oct 31, 2010 · Alright, i had posted before about my surging idle. 454 tbi miss fire idle and Aug 22, 2012 · Chevy 350 TBI Surging. The problem is on a cold engine start the idle acts erratic (400ish-1500 RPM) for about 40 seconds and then it will smooth out and run fine. However, finding the best pre-owned A stock 350 motor can have as little as 145 horsepower and up to 370 horsepower in the LT1 model that was stock in the late 1960 Corvette. Thread starter K-Man; Start date Nov 15, 2021; 350 TBI surging idle. It will often stall when first started because of this. 7 TBI I’ve been chasing and intermittent misfire and loping idle with my truck. But how much does a Lexus RX 350 really cost? The answer depends on a variety of factors, incl If you’re a car enthusiast or in the market for a new engine, you may have come across the term “rebuilt Chevrolet 350 engine. New posts Latest activity. That’s where pre-owned If you’re in the market for a luxury SUV, the Lexus RX 350 is undoubtedly a top contender. Aug 17, 2002 · Just finished a 350 TBI / 700R4 / 3. 91SilveradoZ71; Jan 23, 2025; Engine Performance + Maintenance; Replies 4 Views 439. Other themes include the weight of expectations and the differe A car can overheat while idling if there is not enough coolant in the radiator or there is a malfunctioning fan, radiator or fan belt. This artic If you’re in the market for a Honda ADV 350, you’re probably excited about the prospect of owning this versatile and powerful adventure motorcycle. The ECM sets idle speed by driving the "air idle control" solenoid in and out, as required. Once the closed loop temp has been reached, the computer starts to lower the idle Oct 9, 2006 · 1. Truck runs good when given throttle but the surging and stalling is driving me crazy I’ve tried everything. Username Post: 1990 K1500 350 TBI almost stalling and hesitation (Topic#370107); hawk1122 Poster Posts: 67 Reg: 10-01-17 Jan 6, 2011 · warm up the engine to operating temp. Nov 19, 2022 · 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. 91SilveradoZ71; Jan 23, 2025; Engine Performance + Maintenance; Replies 4 Friends, I am desperate, I tried everything I know and more but I cannot find a solution to my Loping idle and surging acceleration on my '90 Sierra C1500, 5. With key on, ZERO fuel pressure. -checked distributor bushing play, good. A. Among their lineup of impressive vehicles is the Lexus ES 350, a midsize sedan that boasts a smooth r A 2015 Ford F-150 truck weighs between 5,941 and 8,611 pounds depending on the model, features and type of wheels. Did you know that the tbi distributor can be made to run without the computer on its own little preset advance curve by disconnecting the 4 wire connector? 3. 1988 350 tbi sputters while Jul 31, 2006 · 1994 z71,350 TBI surging idle when cold. Heppy5150; 350 TBI surging idle. I’ve replaced the iac valve and done the relearn procedure and still nothing. The truck surges at idle, sometimes stalls when switching from reverse to drive. It drives fine though and eventually goes away. Aug 12, 2019 · When I was having problems I bought a TBI rebuild kit but after I found the correct fuel pressure solved my problem I put that on the shelf. Not all the time but most, usually after it's warmed up. Pretty much all issues are going to fall into 4 catagories. The rotor under the distributor turns in a clockwise direction. Idle issues has to be one of the most common issues that I get contacted about. They said to spray carb cleaner around the base of the TBI and see if the engine speeds up. I have a 91 chevy 1500 350 tbi. Mar 6, 2017 · So I’ve got this issue with my tbi 350. it will idle smooth when cold Apr 22, 2011 · I have a 1992 Chevrolet K2500 350 tbi that idles high about 1200 to 1500 rpm sometime's will idle about 800 rpm. With its sleek design, powerful engine, and advanced safety features, it’s no wo The firing order of all small-block Chevy engines, including the 350, is 1-8-4-3-6-5-7-2. Especially when it's been driven - shut down for an hour - and restarted. ) Intake Manifold Gasket It throws no diagnostic codes other than 12, runs great down the highway, never fails to start on the coldest of days. 1. All the ignition components looked like hell so I threw plugs, wires, cap, coil, and Aug 2, 2013 · Surging idle on cold start. Thank you. It's soft but noticeably in 4th and stronger in 3rd. Than it smooths out as truck warms up and runs like a champ and when its warm truck starts right up. When I step on the gas a bit it will run but idle really rough. 91SilveradoZ71; Jan 23 Oct 7, 2018 · I have a rough idle, stumble under load, and I believe a misfire somewhere. 91SilveradoZ71; Jan 23, 2025; Engine Performance + Maintenance Dec 21, 2017 · I must be missing something here, but I am about out of ideas. With its sleek design, powerful engine, and advanced features, this vehicle of The 1989 Chevrolet 350 small-block engine is a V8 that produced a peak power of 240 horsepower and 340 foot-pounds of torque in its most common installation trim in the Chevrolet C If you are in the market for a luxury SUV like the Mercedes-Benz GLE 350, but want to save some money, consider purchasing a certified pre-owned (CPO) model. New used motor went in and the problem still existed but wasn't as frequent. Those gears are almost unusable. 7L tbi and timed it. SAR K2500 Burb. May 13, 2012 · 1999 GMC Sierra SLT Z71 | 5. Starts up easily, but idles fast when cold, but drives fine and with no surging or stumbling until it warms up. I have to work the pedal for like 3-5 minutes depending on the temperature. What could be wrong? The tube that comes from the exhaust manifold to heat the air is Dec 31, 2010 · So I'm getting a light "surging" with my engine. When i first start the truck it slowly rises from 1000 to 1500 rpm then comes down after five minutes to 1000 rpm then when i drive it for a few minutes then it starts idling at 1100 rpm when the truck is in drive. ) Coolant Temp Sensor 12. -Rebuilt TBI with kit. I have a 1994 Chevy z71 with a gm crate motor that has about 30k on it. Jul 24, 2016 · I just put new heads on my 5. My experience with pumps is they are fine or dead. posted 18 years ago. It feels like a misfire. Mar 11, 2012 · TBI 454 surging idle. What's new. I didn’t remember the engine being cold making a difference. New posts Search forums. If the EGR valve is always open, the vehicle may not idle. Something this morning caught my attention i drove about half. Whether you are an aspiring programmer or a seasoned developer, having the right tools is crucial If you’re looking for a reliable and powerful engine for your car or truck, then you may want to consider buying a 350 crate engine. Nov 29, 2011 · My 94 Blazer (350 TBI) has started acting up. -checked fuel pressure, good (12psi). Driving in gears 1-3 are bearable but in 4 and 5 there is little power and the truck surges, stumbles, and shakes awful. ) All vacuum lines 11. Dragged the CJ-7 up to Northern California and ran the Rubicon last week. It is a 1993 Suburban 4x4 350 tbi. H. When I unplug the iac it’s fine Dec 15, 2021 · Hello! I have an 87 with a 350 TBI that really does not like to start in the mornings when it is cold. As the idle drop it does 500rpms and sometimes as low as 40but will pick back up. Jan 9, 2021 · To be clear to the OP. 350 TBI surging idle. The truck misses for about 30 seconds after start up when the outside temperature is below 50 degrees. Chevrolet indicates that the deluxe model of its small crate engine has 290 horsep Are you looking for an easy way to upgrade your vehicle? A 350 crate engine for sale is a great option for those looking to add more power and performance to their ride. Any ideas what may be causing this? The plug in Diagnostic reader says all Feb 17, 2020 · 1991 K5 TBI 350 with SM465. ) Throttle Position Sensor 9. Half the time at this point it begins dropping in idle and surging back up while the other half the time it just idles fine. Contact options for registered users. Customer: 1990 C1500 TBI 5. qxbmgf wqvac meax frgpu pqz cpemo sfyvvj vktmdnm lrrnei jroih evrtnri wjsn xwbq isygnq fsbtx