Silverado Rough Idle At Start

I now have to give it gas to get it started and can then smell raw gas as if it were flooded. After the above repairs were complete the car was started and there is a loud squeak, knock, then a rough Idle. Put seafoam in vacuum and gave truck a tune up problem still occurring. I have an 04 Canyon single cab. I know servicing that helped with the rough idle on my '04 Silverado, keeping my fingers crossed it does the same with the bimmer. But if the valve goes bad for any reason, the idling will go from smooth to rough. They claimed to run a VAGCOM on it and found no faults, they resetted the computer, re positioned the throttle body and "messed" with the idle control. The first sign of the problem was the service engine light would blink intermittently when driving on the highway or revving the gas. at idle the voltage goes from 12 to 14 just bouncing around , i tryed the the MAF sensor cleaning and it helped somewhat i have already. After a couple weeks I noticed that at idle the engine would stumble and my rpms would drop slightly. idle drops a little below 500 rpms and gets rougher. There are also segment firsts like Trailer Theft Alert, Electric Parking Brake Hookup Assist and Brake Gain Memory on the integrated trailer brake controller. 2003 Chevy truck, low idle. oldtimer11, If there is a change when I pull the plugs it is so minute I cannot tell. 6L Duramax diesel engine, may experience vehicle service engine soon (SES) light illumination, low engine power, hard start, and/or fuel in crankcase, requiring injector. The 'Cold Start' is a term used engine drivability implemented only when the engine is at (or lower) than ambient temperature. 3 L Missing and Rough Idle Intermittently I have changed Spark Plugs,Wires ,Coil Packs, and removed Fuel Injectors - Chevrolet 1999 Silverado 1500 question. When I drive it, it seems to run fine, only rough at idle at stop lights. After a few tries with the '0 compression' sound she will suddenly catch and fire up, then building through the rough idle to slowly smooth out. I recently received this vehicle from my brother-in-law, I have done the maintenance on this vehicle for years and have never been able to figure out the random misfire. AutoZone gave me the following codes: "P0131" and "P0300. The following is a list of problem symptoms discussed in this guide: Engine Will Not Rotate; Engine Will Rotate But Will Not Start (Fire) Engine Is Difficult To Start When Cold. Anyway, I put a little larger bolt in just to test it. i'm wondering if there is some blow by, or some sort of vacuum loss thru the EGR valve. After a couple weeks I noticed that at idle the engine would stumble and my rpms would drop slightly. If not, cycle key on, off, on, off, on. Hopefully, the check engine light is on. At least from my stand point. Your Silverado does not have a programmable key, but it does have a Passlock system that can be reprogrammed, but more than likely the sensor itself is bad and that would require replacement of the ignition cylinder housing assembly. This troubleshooting guide is intented to help identify and repair engine starting and running problems and engine lubrication system problems. Re: Cold Start Rough Idle Nov 29 2018, 9:11pm yamazippy wrote: To add to the diagnosis, I let the tank run until the fuel light came on and fueled up this weekend. To learn more, see reviews below or submit your. When this code appears, it means the PCM (powertrain control module, also known as engine control module in other vehicle makes) has determined a rough engine idle during cold start. 3 with active fuel management. I called the guy and he's an ass said "sorry, as is" and hung up. 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. Its idles at 850 now, but I still have stiff brakes at idle. I am based in Australia. Idle is rough for a few seconds also. Coat the Spider Fuel Injector assembly O-Ring with a lubricant. But the surge problem is still there, and now it sometimes revs high. The timing connector for the Chevy Silverado breaks out of the engine wiring harness conduit adjacent to the distributor. While there are a variety of reasons your Chevrolet Silverado 1500 has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. 2008 Tahoe rough idle cheap simple fix P0300 Random/multiple cylinder misfire,due to low compression P0171,P0174 2007 chevy silverado 2002 Chevrolet Z71 5. CarComplaints. That's a cold rough idle start. Truck runs great until you apply brake. Once it is warm, it runs good unless you try to accelerate real fast. Choose top quality brands AC Delco, API, Delphi, Forecast, Ramco, Replacement, Standard Motor Products, Walker. I took it in to the shop for rough idle. Advance Auto Parts has 3 different Fuel Injection Idle Air Control Valve for your vehicle, ready for shipping or in-store pick up. Hesitates at various moments when accelerating. Sometimes hard to start and emits grey smoke when started. After I have it all fixed and can drive it some, I will report back as to the success of the. Truck runs great until you apply brake. A harsh shift and rough idle may be felt on some 2014-2017 Corvette, Silverado, Sierra; 2015-2017 Escalade, Suburban, Tahoe, Yukon; 2016-2017 CTS-V, and Camaro models. Its a rough Idle start Code P050D. 1998 Chevrolet Silverado Stalls When Hitting Brakes When i apply the brake it kills the motor on my 1998 Chevy Silverado 5. My 1991 Chevy Silverado starts up ok, but has a rough idle until it warms up. Randomly at a red light the car will start to rough idle. Becoming more of an issue and need resolved. Learn about this problem, why it occurs, and how to fix it. Deaerlship said no codes were set so nothing is wrong. AC works fine, but I am looking for an alternative way to add vacuum for stop and go brakes. Hopefully someone can help me out here. Was running OK, but died last week and CEL/runs rough. The RPMs drop to 500 and bounces to 700 for a few seconds, 5-10 maybe. and when I think it's swithcing from OL to CL. there are no codes to speak of. Now, I have a really rough idle for about 10 to 15 seconds after a cold start. 7 fuel injection throttle body. If the rough idle occurs only under cold start conditions, a malfunctioning engine coolant temperature (ECT) sensor may be at the root of your problem. If the rough idle / vibration concern is E1. 7 liter 350 engine I have done so much work into it it has a new fuel pump Gas tank new valve cover gaskets new intake gaskets new radiator a new water pump. Since then, it has become worse, and now there is the additional symptom of a STRONG fuel odor. A spark plug, although small, is a vital piece of your vehicle’s equipment – and without decent spark plugs, it will not run as efficiently as it could. We’ll cover the most common causes of rough idle below. 3L and it ran good for the test drive. I have a 2003 Chevy Silverado 6. driving down the road it does fine, never sputters or struggles, but once i stop at a light it starts the rough idle. this is the easiest and fastest thing to do and its free!. its a 2000 chevy silverado 1500 LT with the 5. Also when started mine will sit at 1500rpm for about 10 seconds then go down to normal idleis this normal?. Again, start the engine and compare how it is running at a stop to how it normally runs. So, you replaced the fuel pressure regulator, or the entire 'Spider' fuel injector assembly and now, when you start the pickup (SUV, van or mini-van) it idles very rough! If this is happening to you, then let me tell you right off the bat that the most likely cause is a major vacuum leak caused by a broken 'Spider' assembly O-ring (see. Running Problems. 2017 Suburban Rough Idle. Read more about. Once it's warm it runs absolutely flawlessly, tons of power, smooth as heck, rock steady idle, good acceleration - you'd never know there was anything wrong with it at all. The best part is, our Chevrolet Silverado 1500 Fuel Injection Idle Air Control Valve products start from as little as $58. Top 10 Causes of a Rough Idle | JL Motorworks. I have a 2003 Chevy Silverado 6. 2002 Yamaha Road Star Silverado 1600(backfiring) TL;dr version: 2002 Yamaho Road Star Silverado 1600, has Vance and Hines LongShots installed by previous owner who was a bike mechanic before retirement, don't recall if baffles are installed at this time. It eventually set off the check engine light with cylinder 1 misfire and random cylinder misfire. Chevrolet Silverado 1500 Stalling or Low Engine Idle Speed Due to Dirty Throttle Body - 20 reports. Took it to the dealership they said that they found no. Rough Country Suspension Lift Kits offer amazing off-road performance at an incredible value. it doesn't matter if the engine is hot or cold. There is no smoke from the tailpipe. New cat still glowing and rough idle. Sometimes hard to start and emits grey smoke when started. it is, and the idle is rough as well. Had the BB Tune bump the idle up to 600 at 1000 miles and that seemed to eliminate it for the time being. I assume this acts like a choke and needs to be closed like this. Re: 1999 Silverado running rough5. & vortec 8100 8. Ive had a slight rough idle since around 500 miles driving the truck with it progressively getting worse over time. Hi there - given your repairs already, I would suspect a. Also when started mine will sit at 1500rpm for about 10 seconds then go down to normal idleis this normal?. P050D CHEVROLET Meaning During a cold start, the Engine Control Module commands dual-pulse mode during Open Loop operation to improve cold start emissions. My 1991 Chevy Silverado starts up ok, but has a rough idle until it warms up. 3 LS engine It's one of the coils. Idle surge/stall after cam swap Just rebuilt a LS1 with a Comp Torquer v2, 232/234. driving down the road it does fine, never sputters or struggles, but once i stop at a light it starts the rough idle. I am more than happy to further discuss your situation and assist you throughout the process of working with your dealer if you choose to go that route. Idle problems may originate in a worn out component, a. Little did I know there was a hidden problem. it runs fine when i first start it, but soon idles low/rough, but only in gear. 2008 335xi, rough start and idle, metal flakes I might just cut my losses on this one it's a higher miles (196k) 335xi (September build date). It will stay at about 1200 rpm when I. Getting ready for a trip so i'd like to remedy this issue asap. The truck runs fine no obvious problem. Chevrolet Silverado 1500 Stalling or Low Engine Idle Speed Due to Dirty Throttle Body - 20 reports. Rough Idle. NAIOA - 2000-2005 General Impala Discussion - Rough start / idle - crank sensor? - Does anyone have any other ideas what might be causing this? - 2002 Impala LS (3800 V6) 113k miles Most of the time when I start the car, the idle is erratic for the first. This troubleshooting guide is intented to help identify and repair engine starting and running problems and engine lubrication system problems. Q: Recently purchased a 2013 Chevrolet Silverado z71 5. You can get a photo by calling your local Chevy dealer service center and requesting one. Before you do anything, hit the broken bolt with some penetrating oil, and let it soak in for a few hours. 3 liter v8 with 18,000 miles seems to idle rough. The Chevrolet Silverado is a full-size pickup truck. i've done a TBI swap on my '86 350. I changed the fuel filter today. after replacing the motor it will not idle,and stalls out when stopping, also noticed that the motor surges, when applying the throttle it will rev up,but it will try to die off unless you let off accelerator a little and reapply. Once it is warm, it runs good unless you try to accelerate real fast. 3 Liter FIXED rough idling by stoping UNMETERED Air inflow UNMETERED AIR WAS CAUSING MY ENGINE TO ROUGH IDLE. That's a cold rough idle start. I have to crank it for a while, and it runs rough and stalls for about 15 minutes after that. I've Cleaned the MAF, MAP, and Air intake temp sensors. Precautions to Take When Installing the Intake Manifold Plenum. Anyway, I put a little larger bolt in just to test it. The random misfire means that all cylinders are randomly misfiring, which means the problem is something common to all cylinders, which most likely would be spark or fuel. Choose top quality brands AC Delco, API, Delphi, Forecast, Ramco, Replacement, Standard Motor Products, Walker. In dual-pulse mode, the fuel injectors are energized twice during each injection event. Becoming more of an issue and need resolved. It eventually set off the check engine light with cylinder 1 misfire and random cylinder misfire. I have a 2003 Chevy Silverado 6. Other than this everything seems to be running very smoothly. It began running very rough, and stalled on me repeatedly yesterday. When one or more of these variables is off it can lead to a rough idling condition. Fuel pump for 08 Silverado. factory cruise control * mittie m. Chevrolet Silverado 1500 Engine Problems. Re: Rough idling 2005 Chevy Silverado start by cleaning the throttle plate and throttle bore, this engine is drive by wire and doesnt use idle air control valve, this is done with the throttle body. Hopefully, the check engine light is on. 3, 4L60E, 4x4) Idle issues Fuel pressure stabalized after then filter swap at ~32psi "line on", meaning I didn't do anything but hook up the gauge. The colder the weather the rougher the idle. Chevrolet/gmc: after cold starting engine and placing in gear, would have a rough idle and/lack of power, momentarily before startup a few minutes later. There are also segment firsts like Trailer Theft Alert, Electric Parking Brake Hookup Assist and Brake Gain Memory on the integrated trailer brake controller. The Crux Hence, after knowing the ways to troubleshoot rough idle when warm problem, anyone can now keep a check on their vehicle’s status. Some older cars use a carburetor to process fuel, rather than a fuel injection system. Strangely, as the engine warms up, the roughness tends to go away, which seems confusing. Engine drivability strategy is much different under cold start conditions. Mechanic's Assistant: Are you fixing your Silverado 1500 yourself. This company is not yet accredited. 2005 Silverado won't start post crash; Wiring after Market Tow Mirrors to work with Cab Light? 2010 silverado LTZ rough idle, light flicker, and rattle; Rear brake issues; Brake Squeal; Adding trans temp gauge to stock cluster; Bosch fuel pump on 08 Silverado; 1999 K3500 7. The purpose of this article is to highlight some of these common problems and how to fix them, so your mighty "Five-Oh" runs just as good, if not better than it did during the Reagan/Bush Sr. The colder the weather the rougher the idle. At Edmunds we drive every car we review. Once i tightened things down, the blue smoke was pretty much entirely gone. dragosljvich. Lights flickering at idle (engine, replacing, Chevrolet, battery) Idle is a little rough but not real bad. Deaerlship said no codes were set so nothing is wrong. it runs fine when i first start it, but soon idles low/rough, but only in gear. DIAGNOSE - ENGINE IDLES TOO HIGH. Whether you're looking to run larger tires, give your vehicle a more aggressive look, or achieve outstanding performance on the trails, Rough Country has the right lift kit for your Jeep, Truck, or SUV. i'm wondering if there is some blow by, or some sort of vacuum loss thru the EGR valve. I have a 05 chevy silverado with the 4. The purpose of this article is to highlight some of these common problems and how to fix them, so your mighty "Five-Oh" runs just as good, if not better than it did during the Reagan/Bush Sr. Its a V6 4. Becoming more of an issue and need resolved. '07 Silverado LT Z71. I am based in Australia. I just purchased a 2004 crv and my only problem is when I fill my tank until the fuel pump cuts off the car is hard to start I have to push on the gas while cranking the motor and keep the rpms over 1000 or the motor will idle down and stall out, the engine light is on and it gives me a code p1457 Evap canister leak. A couple days later the light went off but the issues remain. The next morning I tried to start it and it was tough to get cranked. 3 rough idle and dark cold start exhaust. Subject: Information on Rough Idle, Crank No Start, Extended Crank or Misfire Due to Excessive Carbon on Top of the Valves or Sticking Valves, Malfunction Indicator Light (MIL) Illuminated - DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 Set. Choose top quality brands AC Delco, API, Delphi, Forecast, Ramco, Replacement, Standard Motor Products, Walker. it runs fine when i first start it, but soon idles low/rough, but only in gear. Learn what does P050d Chevrolet Cold Start Rough Idle means, location and how to repair? During a cold start, the Engine Control Module (ECM) commands dual-pulse mode during Open Loop operation to improve cold start emissions. The engine idles ok when it is cold but as soon as it reaches operating temp, it will only idle. 1995 Chevy Silverado Idle Issues help? Hello, My 1995 Chevy Silverado 1500 4x4 v8 5. I called the guy and he's an ass said "sorry, as is" and hung up. i'm wondering if there is some blow by, or some sort of vacuum loss thru the EGR valve. This morning it was 55 and i went out and she started right up with about 20-30psi for oil pressure. The engine has idled randomly rough since day one. The Crux Hence, after knowing the ways to troubleshoot rough idle when warm problem, anyone can now keep a check on their vehicle’s status. Does it start after pouring gas in throttle and keep running fine?. How to Replace Exhaust Gas Recirculation (EGR) Valve Is your Silverado experiencing a rough idle and bad acceleration? The EGR valve might need to be replaced. i have a 04 chevy silverado with the 5. One of the most common problems is likely a rough running or poorly idling engine. Truck Trend Garage: 2012 Chevrolet Silverado 1500 Rough Idle Rough Around the Edges. I have good fuel pressure with no bleed down. Precautions to Take When Installing the Intake Manifold Plenum. Information Bulletin - #16-NA-383 - Information on Rough Idle, Crank No Start, Extended Crank or Misfire Due to Excessive Carbon on Top of the Valves or Sticking Valves, Malfunction Indicator Lamp (MIL) Illuminated - DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 Set - (May 21, 2019) - For 2008 Chevrolet Silverado - 4WD. I now have to give it gas to get it started and can then smell raw gas as if it were flooded. 2016 chevy Silverado 1500 5. P050D CHEVROLET Meaning During a cold start, the Engine Control Module commands dual-pulse mode during Open Loop operation to improve cold start emissions. Chevrolet Silverado 2003 4. Over the past two months, it has become increasingly hard to start once the engine is warmed up. A vacuum leak on a fuel injected engine will cause high idle. Rough idle and misfiring, but no codes. Answer: Did this just start all of a sudden? It has been sitting for about 8 months and prior to that there was no problems at all. Becoming more of an issue and need resolved. In dual-pulse mode, the fuel injectors are energized twice during each injection event. When I start it to warm in up in the morning, after a while I will see black soot coming out of the exhaust pipe. Little did I know there was a hidden problem. The harsh shift may […] October 9, 2016 —. 3 so it wont start up less i give it gas and stay on the gas then once i get it going it spudders like it wants to stall and it spits white smoke out and when i start to drive faster it spits it all out and it kinda stops but then when i come to a stop light it starts pouring white smoke out the back im like wtf a cops gona pop ,me let alone with. Below are the four most common. Re: Rough idling 2005 Chevy Silverado start by cleaning the throttle plate and throttle bore, this engine is drive by wire and doesnt use idle air control valve, this is done with the throttle body. There are 180000 miles on the engine. Auto Clinic: GMC Jimmy Rough Idle, ABS Explained, Eliminating Spark Knocking, Chevy Silverado Fast Idle, Buick Regal Hesitating, A/C Fan Not Working Oct 1, 2009 Senior Editor Mike Allen answers. Damage to the car's carburetor and vacuum hoses can cause the engine to misfire, resulting in a rough idle. At least from my stand point. 3 built in 5/11 so it had the updated valve cover and oil shield in the pan. Once it is warm, it runs good unless you try to accelerate real fast. Also when the truck is about to die the vacuum drops way down (14-15). While there are a variety of reasons your Chevrolet Silverado 1500 has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. It is lacking power for sure, and it has a very, very low idle consistently, no matter what time or what temp. Dealer said they couldn't find anything wrong with it, they kept the car since Wednesday. I have replaced plugs, fuel filter, pcv valve and air filter recently during a tune up. Rough Idle If the car starts when cold but, idles rough or does not want to stay running, this can indicate a problem with the engine temperature sensor. Shortly after that, flashing CEL. Bought new Silverado because of complications with the old one ran good for about a week then it started to idle rough like it was missing. please read all of the instructions before proceding. models 2009-2013 express, silverado, suburban, savana, sierra. pdf FREE PDF DOWNLOAD There could be some typos (or mistakes) below (html to pdf converter made them): 2004 chevy silverado code p0300 with p0171 and rough idle. Ever since I bought the boat with 120 hours, when I fire up the motor the first time (cold start) it idles quite rough and sometimes cuts out. A spark plug, although small, is a vital piece of your vehicle's equipment - and without decent spark plugs, it will not run as efficiently as it could. Silverado 5. There are also segment firsts like Trailer Theft Alert, Electric Parking Brake Hookup Assist and Brake Gain Memory on the integrated trailer brake controller. Now just over 1 year later and at 123,000km the light is on again so I brought it in and same thing. The first sign of the problem was the service engine light would blink intermittently when driving on the highway or revving the gas. Your Silverado does not have a programmable key, but it does have a Passlock system that can be reprogrammed, but more than likely the sensor itself is bad and that would require replacement of the ignition cylinder housing assembly. Rough Idle If the car starts when cold but, idles rough or does not want to stay running, this can indicate a problem with the engine temperature sensor. Hi there - given your repairs already, I would suspect a. Changed the plugs and cleaned throttle body so far and - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. The 2019 Silverado engine auto-stop start feature can be disabled by the driver using a button in the truck's cabin. If you need to find new spark plugs for your 5. Rough idle Chevy 4. Current temps are single digits in the morning, approaching 10C. The 2007 Chevrolet Silverado has 3 problems reported for rough idle. Throttle body fine, no codes. Thanks fellas Sean. Replace the cranckshaft & camshaft sensors (myself) 3. I can seem to figure out the rough. There are also segment firsts like Trailer Theft Alert, Electric Parking Brake Hookup Assist and Brake Gain Memory on the integrated trailer brake controller. A normal healthy idle air control valve will provide smooth idling in your vehicle. 3 years 10 months ago #115021 by Tony214447. i have a 04 chevy silverado with the 5. I just purchased a 2004 crv and my only problem is when I fill my tank until the fuel pump cuts off the car is hard to start I have to push on the gas while cranking the motor and keep the rpms over 1000 or the motor will idle down and stall out, the engine light is on and it gives me a code p1457 Evap canister leak. An engine that is idling too high may be caused by a faulty idle air control motor valve that has completely failed or that has simply become weak and is not functioning correctly. This company is not yet accredited. My original problem with my 2004 Silverado 5. 03 Trailblazer rough idle/hesitation Engine Tunes/Mods. Anyway, I put a little larger bolt in just to test it. Rough idle smoke from exhaust 1 Answer. How to Replace Exhaust Gas Recirculation (EGR) Valve Is your Silverado experiencing a rough idle and bad acceleration? The EGR valve might need to be replaced. You may have a misfire, a vacuum leak, or a clogged/faulty idle air control valve. I've had a slight rough idle since around 500 miles driving the truck with it progressively getting worse over time. 3 Sierra Slight Rough Idle Im looking for advice on where to start when fixing a slightly rough idle on a 2011 Sierra I just bought. At least from my stand point. It starts fine when cold. won't start on 1st try, but usually does on 2nd. 3 liter Silverado runs rough until warmed up Make sure and test your O2 sensors to see if they have thrown any codes that are stored in the ECU, if they are not heating up correctly when you first start it, they can cause it to run rough until it is warmed up. Read on for effective ways to track down noises, both outside and inside the cabin, and what can be done to correct them. 3 with 77k on it. 2016 Chevrolet Suburban Owner Satisfaction - Consumer Reports. Also I live in Nebraska and the weather is cold. I lost a lot of idle vacuum at 700 rpms with my cam. Deaerlship said no codes were set so nothing is wrong. THE FIX IS RESEALING. They claimed to run a VAGCOM on it and found no faults, they resetted the computer, re positioned the throttle body and "messed" with the idle control. at idle the voltage goes from 12 to 14 just bouncing around , i tryed the the MAF sensor cleaning and it helped somewhat i have already. Replace 3 motor mounts (at the shop) - except the rear 2. Very common symptoms we all have at one time or another with our 5. A vacuum leak on a fuel injected engine will cause high idle. This troubleshooting guide is intented to help identify and repair engine starting and running problems and engine lubrication system problems. 3L engine and truck has a rough idle and hesitation on accelerating. I've had a slight rough idle since around 500 miles driving the truck with it progressively getting worse over time. I have good fuel pressure with no bleed down. It's hard to start when cold. Rough idle in a 1997 Chevy Silverado? If you know the spark plugs and wires are good, then check for a vacuum leak. I've been dealing with it on my Camaro for the last couple of weeks. Could the tune have caused my truck to start idleing rough? It only does it if the the blower is on and it only seems to do it every 6 sec or so like whe. Order Chevy Silverado 1500 Ignition Coil online today. Learn about this problem, why it occurs, and how to fix it. It did nothing. Fuel tank sensor / pump replaced 1 yr ago as was filter. 3 Vortec with 105,000 miles on it. Low or Rough Idle with Electronic Throttle Control (Clean Throttle Body) I now start getting concerned. 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. I called the guy and he's an ass said "sorry, as is" and hung up. Exhaust has a very strong smell to it. Silverado offers a number of features that help make a long day of towing easy, including the proven technology of Trailer Sway Control, Hill Start Assist and Auto Grade Braking. 0 running really rough in idle. It then bogs and backfires 2 Answers. Hi bigbiz187, Sorry that you are experiencing a hard start and rough idle after refueling your vehicle. P0171 is a very common code for any ODB2 vehicle. Since I bought the car I have done the following: 1. This company is not yet accredited. High idle, rough idle; Hyundai runs rough, misfire codes; P2111 P2112; Rough idle – Ford; Rough idle stalling when using power windows; Stalls but restarts; Surging idle on Honda vehicles; Top 10 rough idle causes; Toyota Camry won’t start; Trailblazer Stalling; Vibration at idle – Jeep; What causes car stalling? Shudder. 7 Idle surging,stalling in the alt. One of the coils is taking a dump, runs fine when cold but then at a certain temp it starts missing, then as the car gets hotter, it starts working again. They did the sensor rebuild kit repair. it happens everytime i start my truck. my question is will a combination of a toque converter out of a v6 700r4 stall be too low (1000-1100) a oem alternator from 3. So, you replaced the fuel pressure regulator, or the entire 'Spider' fuel injector assembly and now, when you start the pickup (SUV, van or mini-van) it idles very rough! If this is happening to you, then let me tell you right off the bat that the most likely cause is a major vacuum leak caused by a broken 'Spider' assembly O-ring (see. Shudder when. initial version: 11/12/2002. When the engine is started cold, the engine temperature sensor sends a signal to the DME control unit to provide a richer mixture. update: 02/15/2003 *important: the factory cruise control option must be present for the high idle switch to function. SYMPTOM SUMMARY The engine idles too high. When the engine is started cold, the engine temperature sensor sends a signal to the DME control unit to provide a richer mixture. Again, start the engine and compare how it is running at a stop to how it normally runs. AC works fine, but I am looking for an alternative way to add vacuum for stop and go brakes. please read all of the instructions before proceding. dragosljvich. There are also segment firsts like Trailer Theft Alert, Electric Parking Brake Hookup Assist and Brake Gain Memory on the integrated trailer brake controller. From last November through January I experienced vibration and knocking on cold start-up a total of roughly a half-dozen times. 7 Hard start, Rough Idle, No Performance' Chevrolet-2500 Pickup Chevrolet Corvette Forum I have a 1991 Chevy truck 2500 with a 5. As I start my car when cold, the engine is too rough, there are no revolutions and it produces some small explosions. The truck runs fine no obvious problem. It will go from very low rpm's, about 500, and start studdering as if it wants to turn off then rev it. Doesn't do this except first thing in the morning. i'm having some issues that i can't quite figure out. 2004 chevy silverado code p0300 with p0171 and rough idle. What causes a rough idle? A rough idle can be caused by many different car faults.