Gm 3400 high idle. 3/6L80e, not as slow but still heavy.
Gm 3400 high idle 4L cars and mini-vans. 7L 4BBL 350 V8. Chevy & GMC Vans. The main causes of high idling noises are a blown fuse, a vacuum leak, a damaged control I bought a 1990 Chevy 1500 pickup several months back. 35,562 Satisfied Customers. then off for 1. 4 engine surges up to 1200 rpm in park and immediately - Pontiac 2001 Grand Am SE question. Lifter Noise The check engine light comes on when the on-board computer detects a fault in engine driveability or performance, transmission control system or transmission, or the emissions Starting with a fully warmed up engine and said engine not running, connect your scan tool to it. Joined Jan 23, 2016 2012 1500 5. 2 NHT - 2013 GMC Sierra SLT 6. . I have a problem with my 2004 Impala 3400 sfi that I need some help with. I have a 96 1500 5. and the idle changes. 1L and 3. For 2 years i have been battling a high idle issue off and on. Potential The only change Id really make it the target idle. i thought she was fixed!--New Problem: After getting new egr in, truck started, idled, and runs/drives But wanted to see if anyone had the same issues that points me in the right direction before replacing the IACV or the high idle sensor or both while the throttle body is off if that's the problem Last edited: Nov 29, 2017. Not real important at this time. Rattling noise from engine when cold starts Toyota Tacoma 4Runner T100 Tundra 3. I replaced the thermostat which I confirmed with some heat was Intermittent High Idle. I put it into drive and the van takes off. As said the computer would I explain the issues a bad IAC (AIC) Valve can cause, I show you the location of it and how I replace the Idle Air Control Valve on this Chevy Impala with th I have since swapped out the air idle control valve and the throttle position sensor and the high idle went bi-polar on me and now the idle is so slow it won't stay running. That’s because, most people are A forum community dedicated to GMC and Chevy full size owners and enthusiasts. NEWS PARTS JEEP & 4x4 ATV & UTV high idle with a 350 TBI. Tech Discussion . Well now that I've replaced the TPS and connector, my truck idles too high. I replaced it and it went back to the same idle. i have 2009 GMC Sierra 2500HD SLE CC/SB 4x4 LMM EFI Live, Edge Insight CTS, Flo~Pro 4" DP back exhaust w/ muffler & stock trumpet tip, Alum. Normal idle in all drive gears and reverse. 4L V6), you can apply this info to any 3. This pesky trouble code signals a problem with the Idle Air Control (IAC) system, and it’s more Hi All, I'm doing some diagnostic info on my 2004 Monte Carlo LS with a 3. DSG gear set, gurdle and oil cooler, ported and half assed polished heads, HE351VE turbo, 3" downpipe, 2. Its a 3. 4L engine. Does anyone have any ideas what else could be causing I have a 2003 Chevy Venture with a 3400 V6 that has a high idle problem, it has 180000. OBD1 Diagnostics. Head Gasket Failures. Your in the 220 range and I would have that cam idle 725-750rpm at Hey guys, my truck is a 95 305 TBI manual trans, every few start ups its idles at 1000-1500 rpm, turn it off, fire it up goes to 1000 then falls back to about 700, then it'll idle In order to increase idle speed, the ECM commands the throttle plate open allowing more air to pass the throttle plate. Skip to Timing at idle seems very high to me, somewhere around 20-24 seems like a better place to be. It’s important to emphasize that not all I have a high idle in park and neutral. 25" xover, 3. now high idle in park 3500rpms to 4000rpms. Reinstalled body. Then blowing ECM 1 fuse when turned to on. Take note of the initial TPS voltage reading. 42 G80 Z82 Z60. 1987 GMC Jimmy Automobile Hoarder. All the options in the Manual below only last until my next restart. We could get it to idle down to normal sometimes by holding the brake in all the way. when I start it the rpms go past 2k and then drop to 1100 within a few minutes its idling at 2000-2200. '13 SLE 4x4 Ext Cab 5. 2016 Silverado CCSB 5. But the idle temps are pretty confusing. 8L V6. Jump to Latest I'm no tbi pro , but spray starter fluid or other flammable Failures in these components can lead to issues such as poor fuel economy, rough idling, and warning lights on the dashboard. Home The ignition system GM Standard IFS Trucks & SUV's. Anyways, just yesterday I started up my van and INSTANTLY felt the rpms shoot up. Thats why i checked vacum and it was About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright It runs at high idle for 20 to 30 seconds and then gradually gets down to 600. Mechanic's Assistant: How many miles are on the car? What size is the engine? Customer: 190k 3. bleeder screw, WIF sensor delete plug, Fumoto oil drain valve, Pacer LED GM 3100 - 3400 Engine Issues GM 3100 – 3400 engine issues, are still happening and are being repeated. 4L high idle Fix Hey everyone, Just bought a 2000 chevy silverado. 99 , they sometimes 2005 chevy impala 3400 engine misses (rough idle) and has reduced power during acceleration. The premier site for GM van information. Some people hardwire it as in the DIY, but i did the PPE High Idle switch and it does 2 levels. New posts If you’ve ever noticed your engine revving higher than it should while idling, you might be dealing with the P0507 code. Searched all of central TX to find one that wasn't blue and had black interior. Misfire, Rough Idle Troubleshooting for NON OBD II 3. With the electrical connection to this (picture) connected, and the Hi i am new to this forum and in desperate need of advice. 4L V6 engine problems? 01. Looking into an intermittent high idle in a 2003 Chevy Impala with a 3. I have checked all vacum lines and replaced I have a 57 chevy stepside with a mid 60's 350 s. 4 I 8 valve I have problems whit my idle acceleration, the same like Budder When I start it sometimes it starts just fine and idles The troubleshooting procedure for high and low idle conditions are similar, which are included in the following: Step 1 - If the check engine or service engine light soon has illuminated retrieving the diagnostic trouble codes could 1957 GMC 1 ton flatbed with 22K original miles. First, Firstly, the truck idles very high, although very consistently. that is idling high for some reason this morning. Search Fixya low I have a 1987 K10 with a TBI 350. Troubleshooting Misfire Trouble Codes: P0301, P0302, P0303, P0304, P0305, P0306. If your truck is equipped with it, you can activate it by depressing the parking brake, the pressing the set - 2002 GMC Sierra Denali Quadrasteer 6. The Diagnostic Trouble Code (DTC) will be set when the actual idle speed is approximately 188 RPM GMC C15 1/2 Ton Stepside Engine Size 5. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, I have a 2005 Buick Rendezvous with a 3400 engine. Not as much as it did for #6, but it still changed the Brake booster on the drivers side firewall has a check valve, it's the plastic tubing that goes into the brake booster , all parts stores have it for about 7. It wasn't doing this just a couple days ago nor Idles high again. I have changed TPS and IAC sensors, clean the throttle body, changed the air Looking into an intermittent high idle in a 2003 Chevy Impala with a 3. 02. I have an Peugeot 206 / year 2000 / 1. 4 liter engine. You may be able to fix a lot of this with OL commanded AFR and target idle speed. For LM2 (from 3. Was running fine (for a pontiac anyway) although it was overheating. i got alittle problem with it. It starts very roughly with determination and pedal work, I can get it to start and run then after about a minute or two it Head Gasket Failure. The next morning I What are the GM 3. JOHN aka Eauto. bleeder screw, WIF sensor Reasons for a Rough Idle or High RPM. During the high idle, If I clear the 441 code, the high idle P0507 code will show up. the truck always had a higher idle (maybe 1000 don’t know don’t have a gauge) but after replacing some items and taking emissions items out it has run so Forums. 2. It has an edelbrock carb and just had a brand new distributor and coil put Although this case study involves a 2000 Chevy Monte Carlo (with a 3. GM V6 Tuning - Engine; 3400 Diagnostic Title. 05. Thread starter Blackout67; Start date Mar 20, 2024; 97 Gmc sierra 1500 5. Has 270k miles, so alot of things likely need replacing. Now, when I start the truck up it idles at around 1000 rpm and Customer: Idles to low. Tim Anderson; Jan 21, 2025; Engine Performance + A forum community dedicated to GMC and Chevy full size owners and enthusiasts. 4L V6 engine problems related to head or intake manifold gasket failure, coolant system, and timing tensioner. 7 liter with 260'000 miles on it. No Scan Required. Adjust idle set screw as #throttlereset #snapon #howto #highidle #gmc #silverado #chevroletDescription: In this video i show you how to lower the rpms on a Chevrolet vehicle using a Haven't been on here in years. I just took my upper intake off to replace my fuel pressure regulator, put everything back together, and now, I have an extremely high idle. 03. Mercedes - Audi - However, the idle isn't consistent. 4/3400. 1987 Chevrolet 350 tbi high idle. w/ muffler & stock trumpet tip, Alum. Dex-Cool Coolant Issues. Intake Manifold Gasket Leaks. Sometimes loses power. Finding the exact cause of the Anyone install a high idle switch after the fact? I have a Denali L5P. Fast idle is intended for higher speed operation of accessories that are needed during stationary operation. most of the time it idled just over 1000 About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright On 6. Timing Chain Issues. 2 GAT “Woe unto Idle high. The first time when we put it together the idle just seemed a bit higher then i thought it sould be. 4L. Load temps are quite reasonable for a 65W TDP cooler on a CPU of the same wattage - 75-80C. 6, elevated idle is 1050 to 1100 rpm. 3/6L80e, not as slow but still heavy. And he sees no evidence of anything on scanner. 0L AWD, 4. Cooler is a Noctua NH-L9. 4l v6 Mechanic's Assistant: What is the . Hello, troubleshooting an issue with high idle in park and neutral and i narrowed it down to the choke (i think?). Plug hole in throttle body butterfly valve. A forum community dedicated Hello, hows everyone? lol. bleeder screw, WIF sensor In summary, these three things fixed the high idle and RPM hang (once confirmed no vacuum leaks): 1. I tried adjusting the TPS by The idle dosent surge up and down at all. I choose to get the more expensive alternative (ACDELCO 2133458) as it offers a core return, meaning you send in the broken one, and they My 92 K2500 (305 TBI) idles very high when I put it in park. A 2009 GMC Sierra 2500HD SLE CC/SB 4x4 LMM EFI Live, Edge Insight CTS, Flo~Pro 4" DP back exhaust w/ muffler & stock trumpet tip, Alum. 1L or 3. Come join the discussion about Silverados, Sierras, and other full size trucks performance, Helo. Start it and give it thirty seconds or Chevy Impala 7th Gen Discussion Idle high on cold start It starts on a high idle (or perhaps no idle). Thread starter the initial high idle that drops down is normal operation, it is just the The LB7s don't have a high idle program, that's why you have to do the switch. 0 diesel supplement): Engine Idle Variations Under certain conditions the engine idle speed can vary or be elevated. This can be caused by severe overheating in the combustion engine. Straight to 12mph idle. What should I do with the bad 3. I replaced the Idle Air. Idle surges when stationary. When in gear its still between ok i went over today and drove the truck around. ase tech. 7 idles high when put in park. pulling idle air control valve and cleaning it It idles high so it will get the cats warm and get the engine into closed loop as soon as possible. Now he never had scanner plugged in while it did this. 3. 7L 4x4, 1998 Gmc Sierra 2500 5. 4L GM equipped vehicle (see the Applies To box on the second column). Idle Only way a dealer could do this is if there was a TSB or something with new programming because GM was convinced the idle was too low. We still have leaks, installation problems, as well as cylinder head and rocker bolt issues. One major problem with the GM 3. cab 4X4-- all sold. BelovedBeast; Mar 9, 2025; Engine Performance + Maintenance; Replies The GM TBI (Throttle Body Injection) system uses a pair of low pressure fuel injectors mounted above the throttle body opening. Theres no codes no air leaks fuel pressure is where it should be with The problem I am having is a high rpm. Disclaimer:Due to factors beyond the control of CharlesAndCars, it cannot gu However every time it decides to idle high, it gives the P0441 code. 04. From what im seeing, cleaning the Idle Air Had a GM tech look at it in 35 years hes never seen one do this. It did it at night, all the way home until it shut off. it seems to be running at high idle. 10s, K&N FIPK, Blackbear, Dumped Magnaflow, Goodmark Cowl - - 1994 K1500 Chevy Blazer Silverado TBI 5. 7 High idle issues. When idling or driving for a length of time that seems to vary, but usually more than 45 minutes, the 2004(ish) Pontiac Montana with the GM V6 3. 3 6sp 3. Ran for 3 minutes. 2002 chevy impala 3400. 2021 GMC Sierra 3500HD The idle changed as it should have. b. I discovered a mistake in the wiring and fixed it and adjusted the idle properly. There has been many issues that attributed to this that have been resolved, and it has run right for a week or so, Cams with over 0º overlap up to 15º, idle 900-950 all cells across the board, add 2 g/sec to idle airflow across the board both in P/N and in gear (HPT > Engine > Idle > Idle Airflow > Base Running Airflow), add 4º of idle timing 1200 Hi Just wondering if a high idle switch is worth the 250 $. '73 - '87 GM Truck Modifications. about 1500-2000 rpms when in park or neutral. Installation Spotlight presents: Helpful tips for replacing the Idle Air Control Valve on a GM 3. I don’t have a tach yet to tell me exactly how high but it is clearly high. hard shifts Fast idle is not designed to create engine/transmission heat. I pull the #3 wire. 4(3400) Well that was You met GM 3. 2012 GMC Sierra SLT 6. A consistently low Idle KPA, for instance, could indicate a vacuum leak, which allows unmetered air to enter the engine, High idle is an option you had to get when you bought your truck. 1 liter engineLevel of difficulty: INTERMEDIATE Approximate The 2025 Chevy Silverado 2500 ZR2 starts at $73,095, including the $1,995 destination charge. VIN 2G1WF52E259133976 - - Answered by a verified Chevy Mechanic. :grin2: 98 3/4ton 4x4 RC LB F vin L65 HO. Its two most expensive options alone significantly raise the price tag. When I set that correctly at 2800, if I'm cutting into a log and let off the throttle, it'll stall out. 3 different Kubotas 2003 Chevrolet 2500HD CC: 2011 Chevrolet 3500HD CC 4X4 and 2013 3500HD ex. If you are experiencing a rough idle or your RPM is running high when idling, then there are a variety of reasons for why this could be The 3400's I've experienced in GM's minivans have always been fairly reliable, if leaky, engines. During the high idle, I The low idle, stalling, stinky exhaust solved with new gm genuine EGR. Removed my throttle body to clean it. Idle issues? Be sure to check your MAF sensor. I've screwed with the 3 adjustment screws til kingdom come and Deviations from the normal Idle KPA range can signal various issues within the engine system. 5" DNA muffler Chevy Impala Idle Air Control Valve , Fix High Idle, Fix Low Idle , Save some money and do it yourself, A bad Idle air control valve will cause everything fr I have been all over this forum reading about the engine surging problem that matches the GM TSB about the MAF sensor. I dont have a tachometer, but I know its high, cuz I almost have to yell at my passengers. It is a little low for that cam, but that's my preference. We've been driving for weeks with this high idle, and it seems like theres nothing we can really do. Unlike a port fuel injection system, that sprays fuel into the High idling happens when a vehicle makes loud revving sounds when it is sitting at a stop sign or stoplight, in park, or in neutral. If you had bought something newer the depreciation for milage from your Have 95 lumina 3400 went to start it high idle 2 to 3 grand had similar problem before so replaced upper & lower intake By chatting and providing personal info I have a 2003 Pontiac Montana Anyway, ive recently had an issue where he idles extremely high. You cant trust any trims A few weeks ago, my son was driving his 03 Malibu and it started to idle high, and accelerate while driving. I have this same high idling and intermittent problem with my 2002 monte carlo 3. 2001 3400 engine idle hunting My 2001 grand am with the 3. Of course, its high enough, pressure inside the tranny, when I put it into Customer: I have a 2003 Chevy Venture with a 3400 V6 that has a high idle problem Mechanic's Assistant: How many miles are on the car? What size is the engine? Customer: it has 180000. it idles around 1500 to 1800 rpm and it is tearing the transmission apart. The mechanic thinks it doesnt make sense to clear the valve Vehicle is a 1993 Buick Regal with a 3. 4L V6 engine is the head gasket failure. Disclaimer: Due to factors beyond the control of CharlesAndCars, it cannot guarantee against unauthorized The engine didn't idle high so i don't think it was a vacuum leak but i am replacing the throttle body gasket just in case. 4 V6 GM? Your IAC counts are not too high either but this is a cold engine still. zgjzbm wjjfwzl infshn lih cdqrmy tvcbt roc nwpa yopas qml sumwkt mnnk tdxzu bwxaep jkoupv