Rough Idle At Stop

One reason for a rough idle is it could be time to clean out the fuel injectors or it could be time to change out the spark plugs. But when I come to a stop light and just let it idle it messes up. It has had a rough idle ever since I bought the car. Idle Stop-start systems (also called "Idle Stop") that automatically shut the engine off when the vehicle stops moving to save fuel, and then automatically restarts the engine when the driver presses down on the accelerator pedal are becoming more and more common on late model. Mine tends to idle rough when I'm at stops with the CVT in Drive. and also my truck will not idel right until it hit operanting temp i have replace the coolant temp sensor and the egr valve i have a 92 chevy k-1500 with a 350 if any one any idea of what this is. Rough Idle/Acceleration My car is idling and accerlating very rough. Does the car sound funny when idling, like it is almost misfiring. New 05 X5 Help with rough idle issue. Rough idle BA 6 cylinder - Ford Modifications Website. Holes in the air intake valve. I can only notice it when its in gear and i am at a stop. I then proceeded to take it on a drive. 2011 Chevy Equinox stalling/rough idle. A loud screeching sound like a belt rubbing (at all rpms). However, the most likely causes come from the basic operating components that control fuel and ignition. Now, this is how they fixed it, the tech loosing both engine mounts and tranny mount a bit drove it around the block and then came back and re-torque to factory specs. A downloadable repair manual is a digitally delivered book of instructions that provides step-by-step maintenance, troubleshooting and repair procedures. Some older cars use a carburetor to process fuel, rather than a fuel injection system. I have a 2012 4 cylinder Escape and I also have the rough idle when it is in Drive too, especially sitting at a red light. It is nothing to cry about in my book, so I am not going to do anything about it. This has got to be something small and stupid I think, either a plug or sensor not connected or that leaves me with about 3 more things. The engine works fine when applying the gas, but its idle is lower than it should be. It's more of a feel than seeing the rpm needle move. I have a 2005 double cab with a V6-Auto with K&N AF that has approximately 90k miles. When its in gear at idle (like a stop light), it struggles to stay above 500 RPM, and will occasionally stall. It only does this when coming to a complete stop, and it smooths out after 1-2 seconds,. This topic Now I've got a shiver when in idle both in gear and out of gear. I have a '00 GLX Tip. The vehicle also hesitated when accelerating from a stop. Lately, I've been noticing a rough idle at stop lights when the car is in drive and the brake is on. I had the first episode of a poor idle after a hard stop this weekend. -New fuel filter – no effect. Cause: This condition may be caused by a fuel trim value not being reset after an intrusive evap purge test, causing a temporary lean condition. Once restarted, the vehicle was shifted into reverse and the vehicle stalled again. Other reasons for the rough idling include: Exhaust problems. The original ground was only 16 gauge or so. This vibration is more visible if I suddenly stop in traffic. Rough Idle & Shimmy – the Ultimate Guide! by Steve Wilson (Including information about Catalytic Converters) Thanks to Johan for examples/pictures on his website – to follow the links hold down CTRL and press the link: 1) Spark plugs, plug wires, rotor & ignition coils - Clean and inspect. Next day truck idles rough after it is started and at stops. Below are the four most common. For faster and easier. 4-liter Triton V8 engines. Trying to figure out the low? rough idle on my 06 H3, with the I5 3. I have a rough idle. Every now and then at a stop, the car will get a jumpy rough idle. My Toyota Camry seems to idle rough when I come to a stop (i. When I purchased the car it was so quiet I accidentally left it running once but now the car shakes and is loud, especially in park. When i drove the vehicle for the first time, I had the mech check the rough idle. ? All explain are approximative value. When the problem first started, I started to idle rough and die on occasion in driveway or stop lights. The Saab local service told me to "live with it. It only takes a minor problem like a fouled spark plug to cause your engine to vibrate. The misses still happen as I speed up, just not as apparent. corrects after turn off/on. Other offerings include STOP DataPro ®, STOP ® for Supervision, STOP ® for Healthcare, STOP ® for PSM and STOP ® for Ergonomics. Forum Home. i have different problem with my idle. Cruises with little issue until she stalled at 70 mph. I was told the vehicle had sitting for awhile which was causing the rough idle. Every now and then at a stop, the car will get a jumpy rough idle. Re: Fixed Problem - Rough Idle and Bogging down I had that code before,I replaced the coil it went away, But it came back. There are several reasons why this happens – some major and some minor. The enigne is a six inline 262 twin-H. My Avalanche is a 2008 (31,000 miles) and about 3-4 days ago, I noticed a rough idle. This only happens after driving the car for a bit, car idles fine when I first start it leaving for work and going home. Technician retrieved Diagnostic Trouble Code (DTC) P0171 and P0174 (System too lean banks 1 and 2). The check engine light doesn't come on and it seems to run fine, but for example when I'm at a stop light, and the car is in drive but I'm on the brake, it does idle pretty rough, gets pretty loud. I had a similar issue with an '02 XLT Escape with 170k. I have done an oil change, checked motor mounts and trans mount (they seem to be ok). Other than that it runs - Answered by a verified Chevy Mechanic. Idle problems may originate in a worn out component, a. Holes in the air intake valve. , at a traffic light). When in drive the engine shutters whether A/C is on or off. Ford F-Series Rough Idle/Vibration Problems weekends and working on a rough idle problem. All that seemed to come to about 75% improvement. This topic Now I've got a shiver when in idle both in gear and out of gear. You can also put it in park or neutral and it will still do it at this time too. Initially I thought it may be bad gas so I got some fuel injector cleaner. It was probably around 85 degrees still and I got stuck in some stop and go traffic on my home, so the engine was at 220 degrees for a bit. Car idling rough inspection, troubleshooting. I drove it today and after driving for three miles I came to a stop sign and while sitting at the stop I thought the engine was going to die, but it did not. It is nothing to cry about in my book, so I am not going to do anything about it. Hey guys, I have a bone stock 2004. Now the lurch is gone and the car feels smoother while driving and the lurching from a stop is gone. Quick Links Solving Automotive Idle Problems Home Honda Idle Issues, Hunting Idle Idle Speech Idle Speech, Page 2 I get a TON of questions about Honda idle problems so I've put together this article to help you should you run into a rough idle on your Honda. The engine was running rough (misfiring) between idle and 1600rpm when cold. I have a 2008 Cayenne S with 70k that is stock. (By rough I mean unusual vibrations, minor noise from the engine. Let me use an idle complaint that had me on the ropes as an example. I reconnected it ten minutes later when I was done and tried to start my car and it died. 2009 - 2014 F150 - Rough Idle when stopped at lights and in gear - I know this is hard to diagnose without actually seeing the vehicle but I could use some ideas on what to look for. A rough idle/misfire usually starts out as being merely a nuisance, but if the causes are not identified and corrected, it may result in your engine not starting, or stopping altogether when you least expect it. Simply put, the engine in your Kia will shut off when the car is idling, resulting in the desired efficiency and emissions improvements. I found an Italian tune-up worked pretty well clearing it up. As far as your brakes go, it is a good thing that your brakes stop your truck quickly. If you're really stuck I'd take it to a shop for diagnosis, then get the parts and do the work myself. So if you have a rough idle and a check engine light and it falls within the warranty coverage then i would go to a Chevy/GMC dealership and have them check it out. Extreamly rough idle only with a/c on was created by Pickles92 The idle isn't perfect with it off, but when I turn the a/c on it get horrible. I had the car scanned and it directed me to replace crank shaft sensor and both intake and exhaust valve solenoids. Rough idle that goes away as soon as you start driving. I was experiencing the same rough idle in my 16 Tahoe. Idle definition is - not occupied or employed: such as. Cleaning out the carburetor to remove carbon deposits is probably a good place to start. What Does It Mean When Your Car Idles Roughly? my car idles rough but runs smooth engine idles rough and shakes car idles rough at stop car rough idle when hot car idles rough when stopped in drive car idles rough but drives fine car idles rough when warm. It's more of a feel than seeing the rpm needle move. Subject: Intermittent high idle or idle hang up (above 2000 rev/min) with/without moose noise. 6 would develop a rough idle after time especially if I had not driven on the highway for awhile. 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. Hey guys, I have a bone stock 2004. How to fix engine idle problems in your car DIY with Scotty Kilmer. That clears up rough idle for many. Mechanics may also provide a fuel system cleaner service as part of oil changes, which is another way to either fix a rough idle or prevent a future one. I was thinking about ordering a new idle air control valve to fix it but not sure if thats totally the problem. 2l 103065 Miles When decelerating on the freeway to come to a virtual stop for traffic, when stopping at a stop light, when pulling out of the. The idle is extremely rough and feels like it is going to poop out. One of the most common problems is likely a rough running or poorly idling engine. I've a rough idle on my 54 super wasp after being fixed for the automatic trans. It can also help to diagnose rough idle issues and hundreds of other problems. It seems to happen more often after having driven a long distance but occasionally occurs during shorter trips. Next day truck idles rough after it is started and at stops. When you stop at a stop light or your car is in park it idles rough kind of a pulsating idle instead of smooth and you smell antifreeze when you get out the car but no engine light is on What is. HPTuner files Engine Tunes/Mods. Rough idling can be relatively cheap to fix, so users should request a diagnostic from a mechanic as soon as they suspect the problem. ) If I switch to Neutral the rough idle subsides. Just adding additional clarification if it helps you come up with an idea that is plausible. It has recently devoloped a low and rough idle. You may have a misfire, a vacuum leak, or a clogged/faulty idle air control valve. But, I only have vibration when at a stop and the car is in drive. It usually causes a rough idle and the check engine light will eventually come on. - Answered by a verified Chevy Mechanic. No difference is noticed with the A/C on or off, as well as the stereo. Other than that it runs - Answered by a verified Chevy Mechanic. 0 Vortec with a PO300 random misfire/rough idle issue. A rough idle/misfire usually starts out as being merely a nuisance, but if the causes are not identified and corrected, it may result in your engine not starting, or stopping altogether when you least expect it. When I push on the brakes hard it's fine until a few seconds after it comes to a complete stop. Extreamly rough idle only with a/c on was created by Pickles92 The idle isn't perfect with it off, but when I turn the a/c on it get horrible. Trying to figure out the low? rough idle on my 06 H3, with the I5 3. I noticed it has rough idle and lately has been getting worse. Have not found that screened device. It only seems to have the rough idle at a stop or crawl. I have a friend who has a 2006 Mazda Tribute 4 cylinder. I own a 06 Accord I4 automatic with 56K miles. Have to keep the idle above 1500 rpm's to keep it running. You start the engine cold and it will hardly run. A rough engine idle or stalling is a common complaint, but in some cases can be difficult to resolve. what coul be the problem. Has anyone else. So I think it's different than a change in idle due to the AC compressor. The issue started as a intermittent rough idle at stop lights and pulling into parking lots its would go down to 200 rpms then pick right back up. But, I am barely getting 11 mpg out of that little 250 and I don't get it. It vibrates/shakes at the stop light but when im driving again it goes away. Affected vehicles may exhibit sporadic rough idle and/or a rattle-like noise while driving, with the check engine. On later model vehicles, a check engine light may accompany the issue. Sometimes it's so bad the car will lurch like the engine has a misfire, or the transmission is trying to grip or something. Car runs rough and shakes while idle at stop light. It tries to die then comes back. I went to the dialer and they charged the battery, but after nearly a week the battery warning appear again. The Ford/Lincoln tech took a quick peek yesterday and said it does NOT sound like a vacum leak. A code P050D should be addressed at your earliest convenience and considered severe. Driving is OK. If you're really stuck I'd take it to a shop for diagnosis, then get the parts and do the work myself. I have a mysterious rough idle on my car that feels like it coincides with the engine. I am having a bit of an issue with a rough/low idle that occurs on,y when the car is in gear (drive or reverse) - it occurs specifically when the brakes are applied - stopped at a light, drive through, etc - It has idled aroun 700RPM for a long time, but recenlty when stopped the cooling fans kick on and the brakes applied the idle will drop well below 500, the car vibrates until it picks back up. I took it out on the highway and got her warmed up. Can anyone offer some. My 01 has started to get a rough idle recently too. 4L v6 with about 187,000 miles on it. 5 with about 85,000 miles Little history, purchased new from Southbay Hummer in 06, at 17,000 miles the dealer replace the cylinder head all good till about 70,000 miles, when I saw blue/white smoke at start up after sitting for few hours at work, no CEL, but the motor would idle too slow and almost die at stop lights. I then proceeded to take it on a drive. The engine works fine when applying the gas, but its idle is lower than it should be. Cleaning out the carburetor to remove carbon deposits is probably a good place to start. rough idle when stop asked by Beatrice S on March 01, 2017 I have replaced the evap sensor, spark plugs, spark plug coils, gas cap, cleaned out the throttle body and the maf mass air flow sensor. How to fix and repair a car engine that idles poorly, rough, or low. When put in neutral you can still feel the engine running rough but you (obviously) can't feel it through the steering wheel or seat. I replaced and the spark plugs and switched ignition coil with a different cylinder and still says cylinder 6 is misfiring. A week had passed and the car would still idle rough. Engine rough idle problems arise because car engines are demanding. *SLC: Bulletin Number: 01157: INFORMATION REGARDING TRANSMISSION FLUID USAGE CHARTS. Yamaha F115 four stroke rough idle question I have a 2004 Yamaha F115 four stroke that has me baffled It runs great at just about any speed except low idle / in gear (out of gear, no issues). This will go on for a minute or two and then run like a champ. I have a mysterious rough idle on my car that feels like it coincides with the engine. when i put it in park or nuetral it idle up but it still lopes. As of recently i get a rough idle while the car is in Drive and im stopped, for example at a stop light. The following checks should be made to repair a non-IAC system problem. Holes in the air intake valve. I would also recommend cleaning the throttle body. I've noticed this happening lately on my 2004 4Runner. WRONG! 2 days later the truck starts to idle rough when I came to a stop. It only takes a minor problem like a fouled spark plug to cause your engine to vibrate. The problem now is that the vibration has changed. __count__/__total__ BMW ROUGH IDLE MISFIRE FIX demonstrated on BMW E46 - Duration: 5:27. once the RPMs are up, it will smooth out , but it idles very rough, like it is missing or something. As far as driving down the road, it was just fine and couldn't tell anything was wrong. I have a 07 HHR with 102500 miles. the dying leads me to another cam or crank sensor. Not in the range yours is and I only see the RPMs drop(800 or so to about 500 then back) when stopped. It is when your brakes slowly stop your truck, you should start to worry. Can you elaborate a little more when you mean idle rough? Does the car go from high to low rpms when standing at a robot/stop street, or when the car is started. The shake/shutter goes away when put in neutral or park. A loud screeching sound like a belt rubbing (at all rpms). I can only notice it when its in gear and i am at a stop. Rough Idle Solved! I recently acquired a 2001 Forester. My truck was doing that as well and later down the road I ended up replacing the head. Just replaced the spark plugs with OEM parts. This is a discussion on 2010 nox rough idle within the 2010+ Equinox General Forum forums, part of the Chevy Equinox General Discussion category! I have a 2010 nox and love it, but it seems that it idles a little rough when it is. The engine is running to provide heat in the car. The vehicle also hesitated when accelerating from a stop. What cause this problem ? Idle move from 600 rpm to 1100 and drop to 400 and back to 1000 non stop. Like so many others I experienced a rough idle. A misfire will cause the engine to momentarily stumble, or lose rpms, and then regain its normal engine speed. However, when I stop at a traffic light/stop sign occasionally the engine will shudder, shaking the car a. It seems to get worse the longer I've been sitting at idle. The idle is slightly rough, particularly after I've driven for awhile and come to stop at a light or at home. Yamaha F115 four stroke rough idle question I have a 2004 Yamaha F115 four stroke that has me baffled It runs great at just about any speed except low idle / in gear (out of gear, no issues). Components in the fuel, ignition, emission and other systems should work correctly. Every now and then at a stop, the car will get a jumpy rough idle. Finding out what is wrong with your car by feel, smell, look, and sound. Thread / Thread Starter. Idle problem. At some point during the month of August the Roadfly forums are going to become archive only. This is a general guide which will list symptoms for 944 starting and running problems and common causes of those problems. It still doesn't idle perfectly, but doesn't drop as badly on idle at a stop light. I have seen several post involving a problem we are having with our 3. I had the first episode of a poor idle after a hard stop this weekend. Ford has issued a Technical Service Bulletin (TSB) for some units of the Ford F-150, Lincoln Mark LT, Ford Expedition, and Lincoln Navigator SUVs powered by 5. 5L - AWD It is pretty quiet, but sometimes when warmed up at a stop light, you hear the fans or AC compressor kick on and the idle will drop and a noticeable change in engine sound is heard. Currently, the engine light has not come back on. One time, it did completely misfire and limped back to my shop. I really hope this isn’t a precursor to the cam phaser problem. I am so ready to just trade it in for something else but it doesnt seem financially smart to do so, especially when I have so little miles. Idle problem. Thread / Thread Starter. The idle will be perfect until car is warmed up then it idles a little rough when in park but when in gear it's perfect, i just said screw it i will live with it. I have a 2005 double cab with a V6-Auto with K&N AF that has approximately 90k miles. The problem: rough/low idle (warm and cold engine) that appeared in the past 3 days and random misses from the engine…at stop lights, car acts like it is close to dying. 2009 Nissan Altima Rough Idle Sign In I have a 2009 Nissan Altima 2. Does anyone know what could be causing this and if you know. Car at Idle, A/C on, Rough Idle after a few moments. and also my truck will not idel right until it hit operanting temp i have replace the coolant temp sensor and the egr valve i have a 92 chevy k-1500 with a 350 if any one any idea of what this is. It was running fine, then one day it was sitting there idling and just started missing. 6 would develop a rough idle after time especially if I had not driven on the highway for awhile. Almost as if it wants to die. I have a 1989 244 DL Automatic with a rough idle problem. New 05 X5 Help with rough idle issue. Rough Idle. hesitation and rough idle. For faster and easier. I have replaced the AFM, O2 sensor, tested the ICV,replaced the TPS, replaced the engine temperature sensor, and replaced the intake manifold gasket. If your car, truck, or SUV doesn't run up to snuff, you can pull off to the side of the road and call for towing assistance. On later model vehicles, a check engine light may accompany the issue. Now, this is how they fixed it, the tech loosing both engine mounts and tranny mount a bit drove it around the block and then came back and re-torque to factory specs. 0L Ecoboost has stalled out on me three times in the last few weeks and it's had an intermittent rough idle since new. 2015 Acura TLX SH-AWD Long-Term Road Test More about the 2015 Acura TLX Rough Start-Stop System. When in motion everything feels ok, However, when i come to a stop with the clutch in it dies out. Sometimes it has a really rough idle. Rough, Unstable, or Incorrect Idle and Stalling DEFINITION: Engine runs unevenly at idle. In addition to this I have performed Fuel Injector cleaning by One Stop service Center upon recommendation of GM Mechanic who notices pinging on Fuel Injectors. front seal leak. So could this be just a rough idle? Wouldn't that show up when I put it in reverse too at a full stop though? The vibration only comes around in D/L/2. Have not found that screened device. The truck has been running fine but this morning, It was idling VERY rough and will stall if I take my foot of the gas. so i plugged it and its idling better. It's that common rough idle problem with the protege. I have a 2012 4 cylinder Escape and I also have the rough idle when it is in Drive too, especially sitting at a red light. WRONG! 2 days later the truck starts to idle rough when I came to a stop. I purchased a 2015 Chrysler 200 in June and have had it in the shop 6 times. I bought my Altima about a year ago and always had a rough idle, it's not so bad now but I feel it and it just bothers me. A general loss of power in the car. My 2012 chevy cruze has a rough idle. I am so ready to just trade it in for something else but it doesnt seem financially smart to do so, especially when I have so little miles. Right now, my car idles very rough, interior vibrates like crazy when I pull to a stop sign or stop light, with the brakes pressed, and in drive. One reason for a rough idle is it could be time to clean out the fuel injectors or it could be time to change out the spark plugs. The enigne is a six inline 262 twin-H. the rough idle leans me that way. Components in the fuel, ignition, emission and other systems should work correctly. A simple turn of your key can keep the air cleaner and save money and fuel. My 2013 Titanium 2. Average failure mileage is 23,000 miles. Other reasons for the rough idling include: Exhaust problems. and also my truck will not idel right until it hit operanting temp i have replace the coolant temp sensor and the egr valve i have a 92 chevy k-1500 with a 350 if any one any idea of what this is. I put it in neutral, gave it a little gas and it came right out of it. My biggest complaint is a rough idle (sound and a slight vibration) when I am at a stop, which is frequent in rush hour. I have a 90 HP Mercury (year 2000). Today you can still net yourself a decent one for under $5,000, but chances are it needs some help. Car idling rough inspection, troubleshooting. I have a rough idle. Idle problems may originate in a worn out component, a. I have seen many posts about this problem, so I believe that it is an inherent character of the engine. Watch tutorials about your 2018 Honda Pilot Idle Stop, including videos and tips designed to improve safety and performance. She said there's been no change and today I finally saw what it was doing. seems like the aircondition. The vehicle also hesitated when accelerating from a stop. 7L Dodge Dakota that has had an issue with rough idle for over a year now. So I think it’s different than a change in idle due to the AC compressor. I Will Greatly Appreciate If You Can Give My Video Thumbs Up And Subscribe To See Future Videos Thank You Very Much Just hit like on my Facebook page to stay connected. [Help] Rough idle at stop lights and rough ride at low velocites (1st gear) I have a 2002 Volvo S40 with 98k miles on it. , at a traffic light). The idle happens when I am stopped at red light or when its just sitting running. Car surges,idle goes very low and almost stalls when coming to a stop. Made almost 30 stop. I have a 2005 double cab with a V6-Auto with K&N AF that has approximately 90k miles. You may also notice that your ABS light comes on. It does not have a check engine light on either but it just idles really rough when I am at a stop light. It also seems to do it worse in colder weather, like low 30's and below. Typically, if this vehicle runs fine at all other times and will have trouble idling when coming to a stop, it is almost always caused by a bad idle control valve. It idles rough not really bad but enough to hear it. The fuel filter was changed a few years ago, and the plug wires around 120k miles. Rough Idle in Drive at a stop Engine My 928 S4 Automatic just began a new quirk. I went on vacation for about 5 days and when I went to crank her up the rough idle is back. Mercedes-Benz E-Class and E-Class AMG: Why Does My Car Idle Rough? Does your engine idle rough? Read our diagnosis to learn if your MAF or oxygen sensor is the culprit. Anyone help?. I replaced my 2000 GMC Sierra 1500 (V8) TPS sensor because of rough idle, did not solve the problem, so I replaced the Idle Air Control Valve, and that didn't fix it either. When its cold (as in first thing in the morning), it fires right up and high-idles for a few seconds and runs fine. No pending codes. A misfire will cause the engine to momentarily stumble, or lose rpms, and then regain its normal engine speed. Every now and then at a stop, the car will get a jumpy rough idle. Sell Your Stuff Are you interested in selling your automotive parts and accessories on Amazon. That's when my wife says to me "oh ya it's been doing that for a while when it's cold. Mine tends to idle rough when I'm at stops with the CVT in Drive. When I have my foot on the brake, the car will shake at idle. Finding the problem can be daunting, especially with so many sensors and switching valves involved. Page 3- '11 WRX rough idle when coming to stop Factory 2. Rough idle at stop light I turned the radio down, looked at the rpm's and they were going up and down like it was missing a little bit. DOWNLOAD outboard or inboard marine repair manuals straight to your computer in seconds—fix your problems now. A loud screeching sound like a belt rubbing (at all rpms). (By rough I mean unusual vibrations, minor noise from the engine. My 01 has started to get a rough idle recently too. Rough idle, no power, struggles to get over 25 MPH 3G Dodge RAM - General Talk. My 2013 Titanium 2. Rough Idle when stopped in drive gear? When I come to a complete stop the car starts shaking and almost feels like someone is in a car next to me with really loud base. Rough idling can be relatively cheap to fix, so users should request a diagnostic from a mechanic as soon as they suspect the problem. I set up the throttle stop and the microswitch best I could but the idle still fluctuates, sometimes stalling, sometimes racing. Just replaced the spark plugs with OEM parts. Threads Tagged with rough idle. The Ford/Lincoln tech took a quick peek yesterday and said it does NOT sound like a vacum leak. Rough idle/hesitation at stop. Hi everyone, i bough in 2011 a 2010 sierra 4x4 5,3l brand new, at 8000km i reported a rough idle ( almost undetectable) looking at the water in my water bottle i saw ripples and it stop and ripples again. Did anyone screw with the stop for the butterfly ? A few things for you to check there. * VACUUM LEAK (High Idle) - If idle is too high, stop the engine. 911SC - hot start, rough idle problem 1983SC with stock 3. The problem began about a month and a half ago when it started getting colder, I live in the East coast. i have different problem with my idle. Cause: This condition may be caused by a fuel trim value not being reset after an intrusive evap purge test, causing a temporary lean condition. I was experiencing the same rough idle in my 16 Tahoe. Started around 19k miles (now have almost 22k). It normally drops down to 500 for a second or two, then jumps back up to 700-800 immediately. At idle, my truck seems to run just a slight bit rough. Does anyone know what could be causing this and if you know. But after a little while the idle starts surging. hesitation and rough idle. all was going well until i had to sit at a stop light for a few minutes and there it reared its head again, rough idle, sat there in Drive, waiting, it came from nowhere?? then when i have to drive away, the thing's running like a bag of wrenchesnot as bad as before the torque down but rough all the same. I have a '00 GLX Tip. At idle, it is very rough but it does not stall. If AC is turned off, the idle becomes much smoother. The last couple of times out it has idled pretty rough and cut out a few times while at idle. what coul be the problem. Every now and then at a stop, the car will get a jumpy rough idle.