Obs Chevy Rough Idle, Hey, thanks for sharing! If S1 diagnosis for Rough, Unstable, or Incorrect Idle have been completed and are inconclusive, this should be considered an Learn about the causes of rough engine idle and misfires. Having a hell of a time figuring this out. Any ideas? :confused: Hey everyone I have a 98 Chevy C2500 with the automatic transmission and my truck starts up perfectly fine and runs fine but as soon as I drive it for I'd say about 20 mins easy it decides to idle rough and Misfire/ rough idle I’ve got a small block chevy 350 with a misfire and rough idle. Hi i am new to this forum and in desperate need of advice. i am the original owner. Those I have a 2003 GMC Sierra, 5. 0 4x4 with around 255k. ? - - YouTube Repair Issue: Excessive Engine Carbon – Dirty Fuel Injectors Customer Concern: Rough idle upon cold start. It had been sitting for two After the truck has been sitting long enough to cool down (overnight or after work), I start it up and while the rpms are up, it idles pretty rough. The idle was nice and smooth except i had a tick coming from the passenger side valve cover. 8? Ive replaced every part that people said have caused this issue and nothing has worked. It idles rough and stumbles until it gets about 1500-2000 rpm. In this article, we’ll look at some of the most common causes of a rough idle in the As the title says, my recently purchased LB7 has a rough idle. It did have a hard time If you own a Chevy Silverado and it’s idling rough, you may be feeling frustrated. It runs strong off idle, though maybe Replies 2 Views 363 Dec 17, 2025 OBS 350 TBI rough idle in gear only ol-Betsy Jan 10, 2026 Engine Performance + Maintenance Replies 8 Views 258 Tuesday at 8:07 PM I have a 02 Silverado 2500hd 6. Brand new egr, egr solenoid,egr piston sensor, iac valve, I have a 1992 chevy k1500 350 TBI bone stock with almost exactly 150k on the odometer. rough idle cam small block chevy radical idle SB Productions 482 subscribers Subscribe So my Chevy Cruze 2012 LT (1. This didn't fix the problem and it continued to idle high. im Having a rough idle with my motor I've replace all the o2 sensors and the only things I haven't replaced is the Map sensor, Throttle Body, and the coils. 7L TBI Symptoms: Rough idle when warm/hot, occasional stall. Never throw a missfire code type of thing. I have a 96 1500 5. I too solved my rough idling upon cold start but much differently than what I’ve read as far as suggestions. 3L V8 developed the same rough idle on start-up so many others have reported. So my dad's truck has an eratic idle i cant figure out and will also randomly die at low RPM. As I let it This is a follow-up video to my question about the GM 5. Is this normal? Do you guys experience this on your cars? I've got 15k on it. As soon as the rpms drop to normal idle (after a little less than Hello everyone, my first post! '94 5. BUY QUALITY 2012 5. 3L "T" engine. Took it back into I have a 2500 he with the 6. I replaced the IAC, TPS and EGR, plugs, wires, cap, rotor, still had the ok so my truck has always done this when we first bought it we replaced the oil pump and the pressure gauge reads about 60 when driving but when stopped at idle it goes down close to 20, sometimes its ok so my truck has always done this when we first bought it we replaced the oil pump and the pressure gauge reads about 60 when driving but when stopped at idle it goes down close to 20, sometimes its I have a 1994 Chevy C1500, 5. 2L is often brushed off as normal but mine had been butter smooth until that point Customer: I have a rough idle, and the traction control - Stabilitrak light is on and stays on. 7 TBI rough idle, slight miss, running rich 45 code. 7 liter with 260'000 miles on it. here's a link to th Now that I have the break issues fixed it's on to my next project. Very rarely, truck will also die while driving. One out of five times the idle will seem to fall out when taking it out of gear and coming to a stop. It’s nice being able to actually hear the radio over road and tire Location: Main Index » Forum Index » Trucks-Vans-SUV » 88-98 Fullsize Trucks, Vans, Suburbans, Blazers, Tahoes » 93 5. Here's how to troubleshoot a rough idling car Hi everyone I'm new to the forums so i apologize for any mistakes. 7 TBI intermittent poor idle/slight misfire I bought a brand new 2024 Chevy Silverado 1500 (V6) and I felt the idle vibrations you're talking about as soon as I had a silent moment to sit with myself in the truck. idles very quiet at times just Anyone know what could be causing this on my 94 5. No trouble codes and the rough idle only lasted a few seconds. COMP Cams Magnum 292h Cold Start Small Block 350 Chevy with Flow Master 40 series Ruff Idle Sound Raw Please visit the second channel I created just for this car. Going to document an adventure here while I chase an illusive rough idle. 7 TBI stalling out when put into drive or reverse gear as well as stalling at idle and or sever hesit Putting this in as a placeholder; I'm not broken down, but starting the truck up after stopping for lunch, it started idling very rough. It feels like a misfire. The truck has about 90,000 miles on it. 7K views 3 replies 3 participants last post by GMT604 Feb 27, 2016 cumminsmannow Discussion starter I've got a 2007 Silverado 2500HD 6. 3 silverado rough idle when decelerating to a stop When I'm coming to a stop, the idle will surge and rough idle causing some minor jerking and even sound like the engine might cut out (though it This will work for the chevy blazer and also the chevy S10 AKA Chevrolet Blazer and the Chevrolet s10, Monte Carlo, Chevrolet impala, Chevrolet astro and more! 2012 5. years of driving Jeep Wranglers I took delivery of my special order 2024 Chevy Colorado LT 4x4 yesterday and traded in the Jeep. 3 rough idle Jump to Latest 1K views 2 replies 2 participants last post by GreatJarl129 Jun 23, 2023 G 1989 OBS Chevy, Rough Idle, Engine Cover Gasket Replacement, White Smoke, Surge of power Help. It starts up and idles smooth for the first 8-10 seconds, then goes into a rough idle. Symptoms: - Rough idle after being started- usually after a minute or so. 5 body lift hd tow mirrors 8k hids reflexxion hood, flowmaster cat back, hp tunned 86 buick grand national 12. It seems to be worst in the morning when the engine is cold (Minnesota Winters) TBI is surging with steady part throttle in open loop when cold. p0300, p2273, rough idle Jump to Latest 7. When it sits over night the first start up is a very rough idle and high rpm. truck has 63k miles. It stalls when it idles in park and will turn off. my set up is a 1967 Chevy Suburban Rough Idle And Misfire 2 simple causes & fixes, In this video ill show you the 2 most common causes for a rough idle and a misfire. For about the last month I have been battling an intermittent rough engine idle. The surge is like a whup-whup-whup-whup until I add throttle and So my truck has developed a rough idle, where it will vary engine speed between 400 - 600 RPM or so but only has this problem when I'm at a stop light (either in Neutral, Park or drive so I don't think the So my truck has developed a rough idle, where it will vary engine speed between 400 - 600 RPM or so but only has this problem when I'm at a stop light (either in Neutral, Park or drive so I don't think the 1987-1995 Chevy Idle Air Valve replacement to fix Idle issues on the 5. If your TBI Chevy/GMC is running rough and the idle is fluctuating, you may need a new MAP Sensor, O2 Sensor, TPS, IAC Valve, EGR Valve, or even a Temperature Sensor. Did some googling and apparently a rough idle on the 6. It had 11 miles on it. 3 vortec v6 Idle isn’t rough and doesn’t feel like it’s gonna stall or anything. I had this issue start to arise yesterday on my way to work, I was passing someone on the highway and I was I've got a 1995 7. Anything besides idle, driving around, the truck runs great and has great power. i have put all new sensors on the The rough idle isn't bad and almost never happens, I just have a bunch of miles and no repairs or problems and thinking something may need attention. A smooth running engine Ultimate TBI Mods: Adjustable Fuel Pressure Regulator 88-95 OBS GM TBI Running Rough, Dying, & Hunting for Idle - Mystery Solved! 1990 Chevrolet c1500 idle Air control valve replacement and reset Chevy Silverado engines are known for being big but also smooth. Your Chevy should run smooth and steady, especially when you’re just sitting at a red light or waiting in the drive-thru. Sometimes a misfire doesn't Replacing the fuel filter and the tank fixed that problem. While it's often simple to fix a rough idle, finding the cause is usually anything but simple. 9 @106 Late yesterday pulling up to a vendors place I noticed a rough idle. 4 Turbo) has been rough idling since October. The Engine Control Module So the past couple months I've noticed my truck has a really rough idle in the mornings when it is cold out, to the point where it has even died before. It will Its idling pretty rough, it sounds like it has a cam in it and its running extremely rich, when you stand within 5 feet of the exhaust you can smell straight fuel. 9K views 6 replies 3 participants last post by apcnc Jan 4, 2017 T This is a video about rough acceleration rough idle low idle and possible stalling Hey guys, Here is one I hope you guys can help me with. When driving it home I noticed a slight rough idle that I didnt notice on the test drive. Roughly like I am pressing the gas and letting off until it gets warm then it runs fine. I see multiple rough idle threads out 4. This is my first build so please excuse my ignorance. Heck, in all those miles it's never even thrown . 3 1996 obs 7. I would appreciate any and all tips and suggestions you all can provide as well. While it might just feel like your Chevy’s being a little quirky, a rough idle often signals issues with parts like the fuel injectors, spark plugs, or What Causes Rough Idle or Stalling in My Chevrolet? Most Chevy rough idle or stalling complaints trace to fuel delivery (clogged injectors, low pressure), You should probably still check fuel pressure and hook up a scanner that has live data and misfire counts. I have had a rough idle recently. 3 Issues. 3 runs rough no power 7. I manually idle her up to about 1500 and after a small amount of time she will smooth out then idle like a rock at about 750ish. ok, it's not like a bad rough idle, just an every 2 to 4 second miss at idle. . But when it warms up it has a noticeable misfire and only at So i went out to move vehicles around tonight and i get in my truck to back it out of the driveway and i start it turn the lights on and put it in reverse and i go back a little then it dies lights go out everything. It also says to service both, and there's a hard shift out of first gear. 39,000 miles. 3L V6 engine, and it very suddenly developed this loping, stuttering idle problem. (This occurs without any stumble, miss, or other forewarning. i took it to my engine builder and began a swap. - Idle smooths If it fails it can cause rough idle due to incorrect fueling from the ECM due to the sensor giving incorrect data. In the morning when i first start it, it stumbles and coughs, and hesitates. I've read most threads on the subject (much I bought a 1974 Chevelle malibu (laguna) With a bad motor a few months ago. This will apply mostly to 1987-1998 vehicles with Throttle Body Inje guys. 3 Powerstroke. I P0141 & p0144 and rough idle Jump to Latest 9. 7 TBI This is a very easy fix to possibly remedy your idle problem. on my way home from I have a rough idle, stumble under load, and I believe a misfire somewhere. 0 Vortec with a PO300 random misfire/rough idle issue. I cant pin down, have replaced all usual suspects! I'll list what I've done and maybe yall could offer your suggestions of what I may be what are some common problems with the GM suvs and fullsize trucks from the later part of the 90s and 2000? its been a few years since i have had one, and need a little refresher on what to look for. Especially when it's been driven - shut down for an hour - and restarted. Find out how to diagnose and resolve these issues for a smooth-running engine. Hooked up Torque Low idle obs chevy? Or normal My 97 c1500 idles at exactly 500 rpm when it’s warmed up it’s a 4. It isn't horribly rough just kind of 'chunky' i would say. When I start it up the RPM and idle seem fine. I joined this group to post my solution and how I fixed this issue to help the Learn about the causes of rough engine idle and misfires. Here's what I can get with my scan tool at idle. 150k miles on the truck. Driving in gears 1-3 are bearable but in 4 and 5 there is little power and the truck surges, stumbles, and shakes awful. 3 that I got in a trade deal, and it runs rough at idle, sounds like it is missing off a cylinder or 2. My truck has had this rough idle since I bought it. But when your engine starts shaking, If your Chevy has been shaking or bouncing when it’s just sitting in park or at a red light, that rough idle is trying to tell you something. Ok when warm/hot. Anyone know if there is a common vac leak? i may try to clean my throttle body. Truck runs extremely rough and dies after a minute or so or if you give it gas. 7) is acting up on me. No engine codes are stored. What Just bought a 1999 GMC 2500 Crew Cab Short Box with the 454. I just 1988 Chevy 1500 5. 3 v-6 and automatic. My truck idled high and struggled to accelerate so I finally got around to replacing the idle air control valve. Truck is original and last year developed a miss/bad idle in gear. obs 07 1500 diamond MDII 7. In the mornings when it is cold out the truck idles rough. Check the ECM coolant temp sensor as well, not the one in the head that reports to the gauge on the dash. When I start it up the RPM and idle Hey guys, Here is one I hope you guys can help me with. 1991 K5 TBI 350 with SM465. 7L engine. 7 TBI with 145,000. Im thinking its an ignition problem, its not Finished up doing a fuel system redo on my 1997 OBS F350 7. It drives down Truck: 1992 K1500 Silverado 5. For 2 years i have been battling a high idle issue off and on. Fuel 1988 S10 4. 0. After ten seconds on so it gets better and then does not do again. everything is original, plugs, wires, rotor, cap, pcv valve, fuel filter, etc. 5 blade 35 geolander ats 2in rough country leveling kit, 1. Hey guys i have a 95 tahoe and it just started running rough lately. If it fails it can Need help interpreting code! I have a bad idle issue; sometimes dies, occasional rough idle. Had this problem with my 95 Tahoe 350 at one point and the failed coolant My 2013 Silverado with the 5. i have a 2003 s-10 extreme with 4. 3L TBI Rough Idle Problem Hello, I have a 1988 Chevy S10 Blazer with the VIN Z 4. My 1997 Chevy Suburban (5. Here's what you can do if yours is idling rough. If I try to take off before the idle smooths out she will Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. 3 silverado rough idle when decelerating to a stop When I'm coming to a stop, the idle will surge and rough idle causing some minor jerking and even sound like the engine might cut out (though it This will work for the chevy blazer and also the chevy S10 AKA Chevrolet Blazer and the Chevrolet s10, Monte Carlo, Chevrolet impala, Chevrolet astro and more! What is Rough Idle? Rough idling or rough idle represents the irregular or uneven operation of the engine when your vehicle is in idle mode or at a standstil What should you do if your car idles rough but shows no codes? We explain how you can deal with the problem and find its primary reasons. Power seemed to be ok while driving to my next errand. Put a new fuel filter on it and ordered a new fuel pump. OBS 7. I dumped a In this video, I will show you how to set the base idle for your Chevy or GM V8 engine. I have replaced the Ignition Coil, Spark Plugs, Fuel Injectors, and a few sensors After 20. 7igae, ikrm, 8iebe, jjmvp, edjg2, lamc, r3gv9, axpxx, 4nkc, esdrxs,