89 S10 Rough Idle

Rough idle Chevy 4. This is a discussion on 1994 Chevy S10 Pickup 4. Page 1 of 4: How to Test the Throttle Position Sensor (GM 4. Jeep Cherokee 1984-2001: Why Does My Car Idle Rough? An engine needs a precise amount of air and fuel to idle smoothly. Why you see Blue Smoke From Exhaust. Not designed to but sometimes the o2 sensor cools off and it drops out, which is considered normal. We have quality car parts in stock for your Chevrolet S10 - Pickup. idle surge, running rough, guzzling gas - 88 Ranger Was searching the interwebs, landed on that thread, unfortuantly it's like a 2003 Ranger. I haven't been able to figure this one out either. The truck is idling very rough; will sometimes die in idle and sometimes just sounds like it wants to. Chevy Check Engine Light Codes. This covers year models 1986-1993, and 1994-1995. When it is about to die I try giving it fuel and it. [SOLVED] 95 Chevy S-10 4. 3 with model 220 throttle body injection. It acts funny. Shortly after that, flashing CEL. When the engine is started cold, regardless of the outside temperature, the idle is rough and there is a noticable power loss. Rebuilt the TBI. Ray, hopefully you're right and the coil I put back in, is. Updated 10/9/19: We’re aware that some customers may experience a compatibility issue with notifications after updating their iPhone to iOS 13. I did all the basics. Feels like its missing. 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. Is their a way to check the regulator or can I completely remove the regulator all together?. This vibration is more visible if I suddenly stop in traffic. Everything checked out fine except the actual temp sensor, I replaced that and nothing has changed other then my temp gauge moves. some people seem to think that they are the first honda owners to have this problem. It had been sitting for two years or so, and the second time I got it to operating temperature, it was running great, sounded good. 89 Chevy s-10 Blazer 4. But if after testing, it is determined that you need a engine, We can take care of you at our facility. it was running perfect. i had an 88 with the 5. 87 Pathfinder rough idle and stalls. If you do take off right away, drive for at least 5-10 miles to completely charge the battery back up. it sounds like it want's to die. floyd Junior Member: Posts: 9 Joined: Apr 2010 Reputation:. To connect with Automotive Remedies, join Facebook today. No codes, check engine light does not come on. Im in need of a little help. * VACUUM LEAK (High Idle) - If idle is too high, stop the engine. It doesn't activate the brakes. ROUGH OR ERRATIC IDLE The erratic idle (both high and low) is more than likely caused by a vacuum leak. Rough idle but otherwise Rough idle but otherwise runs fantastic (1993 Chevrolet C1500) Truck runs great when driving down the road and idles smooth for a couple. It is because rough idle when warm can either be caused by one faulty component or through series of problems. Just bought an 89 classic 2. rough idle - I have a 2001 chevy S10 that on initial startup after sitting overnight it runs rough and the engine vibrates! after driving a few miles the s. Rough idle (engine is shaking), doesn't accelerate smooth - it's all not horrible, but it's not perfect (even worse than in my 740 n/a, which has 500k km and almost no maintenance done ever ;) At idle I feel vibrations on steering wheel, gearbox stick is shaking. 9 EFI - Bought it this weekend. The starter is shot(new one is on the way) however attempting to pull start it after cleaning the carb out (it sat for 4-5 years) was pretty gummed up, got her all cleaned up, pull started it, got it running but only for a few seconds, seems to run out of fuel quickly when it is running. Engine stalls when you come to a stop, after the engine warms up. How do we adjust an engine’s idle speed? In the past, adjusting an engine’s idle speed was easy. Note: An additive can sometimes, however, cause a rough idle problem. 3 i recently picked up on a trade. Finding the problem can be daunting, especially with so many sensors and switching valves involved. It would not start even with starter fluid. I have an 89 Pickup, 2 WD, Manual Transmission with a 22-RE that has almost 140,000 on it. 1989 S10 Blazer 145,xxx miles It will start and idle rough. It idles rough for about 20-30 seconds (longer when colder) then smooths out to a normal nice smooth idle. I have a 90 Chevy 2500 , 5. they have lots of repair. This is a discussion on [SOLVED] 95 Chevy S-10 4. My car is mostly stock but I put 24lbs injectors cause I have to replaced the old one and I thaugh thats gonna be a good idea to upgrade to a bit higher. IT idles roughly, stalls at stops, but seems to run allright at higher speeds. Finding the problem can be daunting, especially with so many sensors and switching valves involved. Here is the problem: At idle the engine runs very roughly. 88 s10 rough idle, no power, cuts out when driving 11 Answers. So last night I had to change the radiator, and i verify the connection to the side knock sensor. It runs fine otherwise. Circuit Descriptions of the GM TPS Sensor. Chevy S10 - GMC S15 and Sonoma Vibrations my dad's s-10 had a rattle going on after my son borrowed it to tow a camper from mo to sc. Hmm, Idle worse with just fan two on than with both fans on. Essentially it helps screen out any impurities in the gasoline that your fuel pump may be sending toward your engine. My 89 CRX DX has a really rough engine idle when I apply the clutch, it drops down past 1000rpms then below 500 and either stalls or goes back to 1000rpms where is struggles to stay until I give it some gas. Read More. 3 engine is known for: bad idle air control valves and throttle control switches. It is intended to help you map out a troubleshooting plan. It idles rough for about 20-30 seconds (longer when colder) then smooths out to a normal nice smooth idle. 9l rough idle - Hi all, I hava a rough idle on my ranger that i cant seem to fix. do NOT contact me with unsolicited services or offers. My 1989 S-10,2. I'd also pull the pin that holds the float and clean the needle valves - check for wear at the same time. 89 chevy s10 misfires and sputters when i give it gas, dies when i stop. 3L Poor Idle Quality Posted to GM Driveability on 10/4/2004 15 Replies Hello This S-10 has an extremely rough idle on cold start, once it warms up it is fine all day, even after several hours of cooling down. Just bought an 89 classic 2. ROUGH OR ERRATIC IDLE The erratic idle (both high and low) is more than likely caused by a vacuum leak. 1989 Chevy S-10 Won't Idle? What might cause your 1989 Chevy S10 to idle fine when cold and idle rough when at operating temp? Check to make sure the EGR valve is operating properly. What you may be considering rough idlemay simply be the hemi shake. This smoke should not be confused with White Smoke you will see when a car first starts up. Techno’s “Know your car” Series # 10 Mazda MX-5. My 88 s10 base model 2. it sounds like it want's to die. I'm hoping that you guys can help me speed up the process of solving the rough idle/rough start issue with my '89 560 SEL. A computer is adjusting the idle speed, based on complex calculations. Gasoline Leak: Fuel injector can crack or break, which will cause a gas leak. Below you will find the most complete list of Chevy trouble codes available. For Sale - 281-728-7673. Reader Question. Have you ever noticed a loud hum and/or whine (whining) coming from your engine bay? Or more specifically your intake area? Well, more often than not, this is due to a dirty IAC (Idle Air Control) Valve. It seems like I've fixed the misfiring issue, but the truck still feels a little weaker than it used to. DOWNLOAD a complete outboard repair manual in seconds. 9 EFI - Bought it this weekend. 8l engine,4 wd,5 speed trans runs rough, like it is not getting enough fuel when the engine is hot and the outside temp is > 85 degrees. It uses excessive fuel and I know we are getting cylinder wash as the oil smells like gasoline after a few thousand miles. One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. Curing Rough Idle. 7 efi in it and i had the same problem, i ended up having to advance the timing on it, which i did just by turning the distributor cap a little bit and listening to. What can I look for to solve this problem? The motor is a 4. So this is my first Volvo. Re: Idle adjustment 25 hp evinrude 89' There is a idle fuel/air adjustment screw on the carb. As soon as I stop, several rough vibrations occur and then it becomes smoother. it runs very rich at idle, CO 2. Put a fuel pressure gauge on it, turn the key on, engine NOT cranking, let the pump run its two seconds, and watch the pressure after the pump stops running. 3L TBI with A/C. I have a 1988 Chevy S10 BlazerHas not been used the last four years. Okay guys, so I'll cut right to the chase. 3L V6 Rough Idle within the Automotive Support forums, part of the Tech Support Forum category. 89 Sidekick HELP!! Low Comp! Rough Idle! Hello everyone. I've quite a bit of experience with old cars and trucks but the newer ones (yes, even 1987) give me trouble. It is intended to help you map out a troubleshooting plan. Condition: A vehicle may have a concern of DTC P050D setting along with a P0300 after a cold startup. Have you ever noticed a loud hum and/or whine (whining) coming from your engine bay? Or more specifically your intake area? Well, more often than not, this is due to a dirty IAC (Idle Air Control) Valve. Start the engine, and set the idle to the rpm you want with the stop screw on the bottom of the throttle body. 2L S10 (~130,000miles. Chevy S10 Rough Idle Causes. It idles rough for about 20-30 seconds (longer when colder) then smooths out to a normal nice smooth idle. It doesn't help that it idles so low (about 580 rpms seems about average). Hi, My wife's jeep has started this rough idle, I call a burble, it seems to idle fine, then every 50 or so revolutions, it will act like it misfires for 3 revolutions. If AC is turned off, the idle becomes much smoother. Our easy-to-install Lowering Kit is a total transformation, offering a sleek, modern look that keeps heads tu. Engine rough idle can be caused by a series of problems, or just one faulty component or adjustment. Discussion in 'Ford Trucks' started by rockin s, Dec 22, 2008. It is intended to help you map out a troubleshooting plan. 3L TBI Rough idle and skip under acceleration - My 89 Blazer idles really rough and shaky, and when I accelerate I can tell it isnt running right. Well it didn't idle rough before I left to get the cleaner this time. The following checks should be made to repair a non-IAC system problem. This article will help you to understand some of the most common causes of misfires and misfire codes (P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308) on the GM 4. Idle Air Control (IAC) Valve: What is the severity of this DTC? A rough idle, or poor idle quality under cold start conditions, could be an indicator of a more serious problem. 045"), which causes it to act as a diaphragm. You start the engine cold and it will hardly run. It has occasionally had an issue where at idle or while driving it would start stumbling and running rough then would clear up. Irregular idle speed. Categories: American Classic Cars | Muscle & Pony Cars. You may also notice that your ABS light comes on. During acceleration - sometimes it's better, sometimes worse - but no pattern. My 89 honda crx High Fuel runs excellent except for one issue. 035-inch to 0. 5L ***Finally Fixed*** BUT, of all the threads out there only a few were actually resolved. Reconnect your battery's negative terminal. A vacuum leak on a fuel injected engine will cause high idle. Re: 93 s10 blazer still idling rough, 08-05-06 03:17 PM - Post# 980906 In response to Hankster Here is a test. 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. I ran it through 2 more tanks with seafoam just to make sure and it continued to rough idle. For Sale - 281-728-7673. Find Chevrolet S10 Pickup for Sale. We offer high quality new, OEM, aftermarket and remanufactured Chevrolet S10 Blazer Idle Control Valve parts. What are some of the symptoms of the code? Symptoms of a P050D engine code may include:. I've come to realize that the 2. It is also used to help adjust the IAC (Idle Air Control) motor during idle. '82 Chevy S10 rough idle after Spark Plug replacement Group: alt. Search our online idle control valve catalog and find the lowest priced discount auto parts on the web. floods at start up poor gpm stutters after shifting then bogs down while accelerating, smooths out after letting up clatter while accelerating like it has low octane rough idle when sitting for awhile, sometimes idle will rev very high after shifting. Reconnect the plug on the idle motor 7. Find Chevrolet S10 Pickup for Sale. It uses a silicon wafer that is thinner in the center (0. It had been sitting for two years or so, and the second time I got it to operating temperature, it was running great, sounded good. This smoke should not be confused with White Smoke you will see when a car first starts up. 035, if those all check out, i would look into your timing. Buy a 1989 Chevrolet S10 Idle Control Valve at discount prices. 7L equipped pick ups and SUVs. Engine rough idle problems arise because car engines are demanding. This creates a vacuum leak and causes the fuel/air mixture to lean out. What Tools do I need?. When it's idling rough it shakes the whole car and if left, the gearbox starts making a noise kind of like a worn thrust bearing. I have a 1988 s10 with the 2. It doesn't help that it idles so low (about 580 rpms seems about average). i always run 94 octane in my truck. Re: Idle adjustment 25 hp evinrude 89' There is a idle fuel/air adjustment screw on the carb. Find car prices, photos, and more. Reader Question I have been slowly trying to tune and perfect my newly purchased 1989 Chevy Camaro. A rough idle is one symptom of a clogged fuel filter. 6 litre cars. What causes a rough idle? A rough idle can be caused by many different car faults. Then shine a flashlight on the roller/pulley at the end of the belt tensioner arm. Choose top quality brands Delphi, Forecast, Replacement, Standard Motor Products, Walker. During the 1998-2018 period, the season average price of corn varied from $1. Needless to say, I'm more willing than I usually would be to spend money on a car this old. Suddenly started running very poorly, but no trouble codes. 5" S-10/Blazer kit ships with a set of durable upper control arms featuring Clevite bushings and rebuildable pressed-in ball joints for prolonged life and easy installation. Rough, Unstable, or Incorrect Idle and Stalling DEFINITION: Engine runs unevenly at idle. Many systems and parts are used to keep the engine idling. RE: 1988 S10 rough idle Vac reading sounds good so I doubt the exhaust is clogged and it also indicates good for vac leaks and ignition timing. The following checks should be made to repair a non-IAC system problem. Taking off from a stop, the truck will sputter badly. 3 erratic idle speed S10 S15 Luv Blazer It's still running rough at idle and at low speeds, seems to smooth out around 35MPH, but have only driven it a. I did all the basics. I just degreased my 1996 lc engine compartment and hosed off the degreaser while the engine was NOT running and when I was complete the lc started hard and idled rough and threw a check engine light on. 3L engine in my S10 that is behaving badly: Symptoms: Cold start and warm start after it sits for a minute (no vacuum pressure?): Starts pretty easily and idles quite rough (rougher than "normal") If I touch the gas, or put it in gear, it bogs and usually dies. A code P050D should be addressed at your earliest convenience and considered severe. 7 efi in it and i had the same problem, i ended up having to advance the timing on it, which i did just by turning the distributor cap a little bit and listening to. Runs fine when accelerating. I'm a newbie to rovers. The gear shifter shakes somewhat and it appears as if the engine is going to die any second, but it has yet to do so. Looking for a 1991 Chevrolet S10 Idle Control Valve? Get yours at Wholesale Prices and Free Shipping over $50 only here at AutoPartsWarehouse!. Now I can hear the pump surging and the truck idles rough/ dies. SYMPTOM SUMMARY The engine idles too high. hey guy i have an 89 ranger i am working on it has the 2. Disconnect the plug going to your idle motor which is located on the front of your throttle body. My 89 ranger 2. The condition is intermittent, but can be relatively easy to duplicate at idle, with the engine at operating temperature, in gear, and with the A/C on, although the A/C does not need to be on. - i got a "rebuilt" alternator from a parts store and the voltage regulator was only charging 12. once i put it in Drive and cruise at low speeds 10-40mph it's real rough. I have a 1994 Chevy S10 Blazer and after a trip i arrived back home and casually turned it off. This trooper will rough idle only at start during mild to warm weather ( greater than 55 degrees), regardless of engine temperature. Took the truck out and drove it kinda hard for about an hour. Hence, after knowing the ways to troubleshoot rough idle when warm problem, anyone. When I am driving and come to a stop light or stop sign the engine idles rough. A coating of carbon may accumulate in the idle air control, and cause malfunctioning. Looking for a 1996 Chevrolet S10 Idle Control Valve? Get yours at Wholesale Prices and Free Shipping over $50 only here at AutoPartsWarehouse!. Any suggestion will be appriciated thanks greg. The main cause of this is that the top plate bolts become loose on the stock manifold and the throttle body shafts are worn out and leaking. Over 30,000 people have reviewed the film on Rotten Tomatoes, resulting in a 72% audience score and an 89% from critics. It's got about 106K and runs great. If the car starts when cold but, idles rough or does not want to stay running, this can indicate a problem with the engine. 94 Chevy Truck surges at idle in gear, loss of power under accel? I just bought a 1994 K2500 w/ 5. Page 1 of 4: How to Test the Throttle Position Sensor (GM 4. when i get into the gas it dont sound like its misfiring or sputtering or anything , but if i barely get on the gas or at idle it runs rough and sounds like its cammed up lol. Carburetor Troubleshooting Guide. 1998 Chevy S10 Regular Cab Short Bed. Symptoms are as follows - random rpm rise and fall, dies or stalls, when in park i can press the brake and then release and the rpms rise and fall rapidly and almost dies, when driving at stop it can die, when decelerating the rpms are not smooth it jumps down a little at a time, fuel economy is horrible, exhaust puts out a. We provide the right products at the right prices. Below are the top 5 causes that a mechanic would look for. After running fine last night, and for a good portion of the day, I was on my way home from Clearwater and the idle became rough. What Tools do I need?. I picked up this car a few months ago, and it's become clear that it's been worked on by gorillas in the past. When i rev the engine it can stabilize the idle, but usually die Posted by t_o_r on Mar 30, 2013. 89 s10 blazer stalls at stop sign after warm. Had it to the dealer today and they felt it but because the computer is not throwing any codes they would not do anything. Find Up To 50% Off Smog Check Coupons by City. 87 Pathfinder rough idle and stalls. I'm hoping that you guys can help me speed up the process of solving the rough idle/rough start issue with my '89 560 SEL. These range from the fuel system, ignition system, engine mechanical systems, and electronic motors/sensors. Reconnect the plug on the idle motor 7. Sometimes it runs better, sometimes worse. Re: 89 accord lxi coupe rough idle help please just as an fyi at this point, but while driving the car last night, the idle smoothed out for a little bit. Honda Civic: Why is My Car Shaking at Idle? If your trusty Honda Civic is shaking violently, accelerating poorly, or declining in fuel economy, diagnose and repair the problem as soon as you can. Looking for a 1996 Chevrolet S10 Idle Control Valve? Get yours at Wholesale Prices and Free Shipping over $50 only here at AutoPartsWarehouse!. Mariner efi 90hp 4 stroke rough idle; Mariner efi rough idle 2012; outboard will only run outside idle screw range; outbored motor idles then dies; parts for 1988 120 hp Mariner idle speed arm; possible cause for dies at idle for a 95 Mariner; possible causes of low engine vacuum at idle on a 2001 Mariner; proper idle rpm for Mariner 100. My 89 Chevy S-10 has 71,000 miles. Another culprit is a bad Throttle Position Sensor (it is located right next to the IAC in the throttle body). so, i am guessing it is an issue with the coil and will start there, as the smoother idle only lasted for a brief moment. Timing is OK, EGR is new, IAC was replaced last night, it still doesnt run right. Hope you can help or suggestRick Response: Your problem you say is below 1500 rpm and that the vehicle runs fine above 1500 rpm. It runs great other than it idles rough all the time. ROUGH OR ERRATIC IDLE The erratic idle (both high and low) is more than likely caused by a vacuum leak. It runs rough and idles very low and will even quit a few times. If AC is turned off, the idle becomes much smoother. One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. Not designed to but sometimes the o2 sensor cools off and it drops out, which is considered normal. it runs fine when i first start it, but soon idles low/rough, but only in gear. This happens consistently with rpms ranging from 500-1000. Turn on the A/C and run the engine at idle speed. well, first off, I don't know what you mean by codes. For Sale - 281-728-7673. Chevy S10 Blazer Engine Won’t Start – Turns Over But Won’t Ignite. '89 Tracker 1. it also seems the longer i sit the worst it gets. After accelerating from the first stop, there is a noticeable lack of power. Carburetor Troubleshooting Guide. How do we adjust an engine’s idle speed? In the past, adjusting an engine’s idle speed was easy. Also, I have taken the truck to the dealer for a diagnostic check. Easy to use parts catalog. only when warm. rough idle - I have a 2001 chevy S10 that on initial startup after sitting overnight it runs rough and the engine vibrates! after driving a few miles the s. Suddenly started running very poorly, but no trouble codes. These engines are experiencing a problem with carbon build-up on the top side of the intake valves. The engine begines to run so rough that it acts like it's going to stall but does'nt. I also put a new pump in and the truck ran good for a bit. While this demands. 5 started running rough when my o2 sensor blew out of the exhaust manifold (faulty welds) i replaced the manifold and the o2 sensor, still roughand has gotten to the poi. 6 TBI started to run rough when muffler decided to go another direction. My car is mostly stock but I put 24lbs injectors cause I have to replaced the old one and I thaugh thats gonna be a good idea to upgrade to a bit higher. What causes a rough idle? A rough idle can be caused by many different car faults. How to Properly Set You Mustang's Idle. "I love this movie so much, I grew up with it, and it is the best Halloween movie ever," one reviewer posted, with many others echoing the sentiment. Stumbles under acceleration. If this is the case, the problem. It may also Run rough when warm, slight knock, no codes setting. On a warm day, when the engine gets nice and warm, the engine can run very rough almost to the point of stalling, though it never actually. 1991 Chevrolet S10 - Sputtering, hiccups, stalling, bad acceleration. 180,000 Miles. After the truck ran for a couple of minutes the idle seemed to smooth out. No change, except now it is blowing very black smoke at idle and while revving the engine. We've replaced the fuel filter. He had a blown head gasket between cylinder 4 and 6 that has been fixed. After this, the car started idling a bit rough when cold, not sure if it's related to the service but it's too late to take it back. The car has run like a champ until the last 2 months. 91 S10 Surging/Bad idle. If AC is turned off, the idle becomes much smoother. The car starts and runs GREAT except for what I think is a high idle when first cranked in the Summer(it takes about 4 mins to idle down to what feels/sounds normal w/ no A/C on), but…if I have to drive up a hill, which are numerous around here, it acts like I’m towing an 18 wheeler with a full tanker on it, and the car’s A/C on. Sometimes it runs fine, but recently it's just been bad. This engine has fuel injection; I checked the fuel pressure, seems OK (the needle on the gauge jumps around some while the engine is running)replaced the plugs and wires, fuel filter, coolant temperature sensor, cap and rotor. Clark) I just replaced the spark plugs in my recently acquired Chevy S10, and was upset to find that after putting in the brand new shiny plugs, the. DIAGNOSE - ENGINE IDLES TOO HIGH. The 1985 Chevrolet S-10 Pickup has 1 problems reported for rough idle at start up, automatic choke light is on. By 1992 a central multi-port fuel injected engine became available as well. I had a similar issue with my '89 560 SL and it took almost two years to sort out all of the issues that were causing the rough idle/rough start. i jumped the terminals in the diagnostic port to check the timing, and it was jumping around from 9-12 or so. driving down the road it does fine, never sputters or struggles, but once i stop at a light it starts the rough idle. BTW, that. The 4banger TBI has a Idle Speed Actuator, which externally alters the throttle blade position for idle, not an Idle Air Control valve like the 4. drove it around for 15 minutes and it started running rough again, so i took it to autozone and had them put their computer on it. Taking off from a stop, the truck will sputter badly. 035, if those all check out, i would look into your timing. Your Chevrolet S-10 takes on rough roads with ease, but a rough-sounding idle is a sign of a possible problem with your Chevrolet S-10 idle air control valve. This covers year models 1986-1993, and 1994-1995. motor was bad when i got it, swapped in another engine. My 85 has a rough idle. Replaced cap, rotor, plugs, and wires. I am the proud owner of an 89 Trooper S with the 4ZE1. If you are having rough idle, or poor performance, just unplug the electrical connector. This is a good example of how basic engine diagnostic tests can work to pinpoint the root cause of the cars problem. 3 V6 and its 2wd. Not designed to but sometimes the o2 sensor cools off and it drops out, which is considered normal. Engine rough idle can be caused by a series of problems, or just one faulty component or adjustment. 0l V6 with a few miles on it, chances are you have at some point experienced this: In neutral, or with the clutch in, the idle surges up and down by itself, between ~600 and 1500 rpms. Find the best deal on automotive parts at a NAPA Auto Parts store near me. 1991 S10 Blazer 4. It has automatic trans, 4. I, personally, have limited knowledge of engines and vehicles, but many of my friends study the subject and seem to know what they are talking about. A few times the truck has stalled while driving, but I was breaking a little harder than normal both times causing the RPM's to go down. new crank vent hose, new clutch rod boot. The engine runs good when it is cold, but when the engine warms up it seems that the idle lowers and the engine starts to run rougher than when I first start it up. the idle lopes from normal on down - never races - and eventually stalls. Since everyone is always asking about it, hopefully this will help. Find Chevrolet S10 Pickup for Sale. I have never seen a motor idle rough and appear to be dying, only to run like a top when you give it gas. The driver may feel a shimmy from the front of the vehicle, or hear clunking or rattling noises on rough roads, when turning the wheel or in hard braking. Engine Hesitates, Stumbles, Lacks Normal Power The computer uses this information to determine how much fuel is needed to maintain the correct air/fuel mixture, and when extra fuel is needed if the throttle suddenly opens wide. My sons 03 S-10 is running rough at idle. I need some help/info. Since you said the idle gets better when warm, maybe the engine expands, and thus sealing most of the leak, which would explain why it idles rough when cold. Bad Spark Plugs. Dirty Fuel Injector Modern vehicles are fitted with fuel injection systems, which inject fuel into the cylinders to create a mix of air and fuel to burn. Discussion in 'Chevy S10 Forum (GMC Sonoma) My recommendation, if you're having a rough idle and can get it going like I talked about. When the engine is started cold, regardless of the outside temperature, the idle is rough and there is a noticable power loss. The first thing you need to do is find out what malfunction code(s) are presently set in the ECM. - Runs smooth and great above 1800 RPM's and has plenty. It seems like I've fixed the misfiring issue, but the truck still feels a little weaker than it used to. 88 Ranger Auto, 2. was created by The_Wolfs I'm new to the forum so let's start out with some introductions. 3 engine is known for: bad idle air control valves and throttle control switches. rough idle, dropping battery voltage. Cuts off when in reverse or moving slowly forward. It is not always easy to diagnose the cause because there are so many factors involved here.