1991 chevy s10 rough idle. It has been going on for about 3 weeks now.

It idles pretty rough (somewhat low it seems), threatens to stall when I ease off the gas at slow speeds, and stalls when I go in reverse. has cat conv checked. I replace original MAP and new vacuum hose. Alternator Replacement ($450 - $486) in Farmington, MI. Table of Contents Diagnosis Causes Shakes Jul 18, 2024 · Modern Vehicle Considerations. 3 engine want idle or stay running what can i try ?seemed like i was out of gas put more in didnt - chevrolet 1991 s-10 blazer question Search Fixya Press enter to search. Dec 27, 2015 · I have worked on various cars over the years and I am getting pretty good at diagnosing my 1991 Chevy S10. 3 o2 sensor is 45 since i put headers on my truck i see it often enough, edelbrock claims if you go to a 3 wire sensor it will eliminate the problem. Oct 8, 2009 · 1991 chevy s10 4. I might have to adjust the idle speed again to fix this. Sep 15, 2002 · 92 4. 5 4 Tech Engine. Before this issue, it has always idled at 1500 rpm on startup and takes awhile to idle down. I have replaced the temp sensor, starter after it locked up a week ago, and the alternator the day before yesterday. The RPM's vary between 50-100. 3 S10 that I'm working on starts strong, but after it warms up, the motor starts to shake, barely noticeable in the cab, doesn't really vibrate the truck at all, just runs strange and vibrates, the truck has a couple things wrong with it right now but I'm just wanting to know if anyone could help me on this or if they've had the problem before. Engine was running fine until I decided to replace the intake gaskets and valve cover gaskets. Now code 34 shows up. But there are many other elements under the hood that can cause this problem. 2l 5sp. 40 over, 272 crane cam, heads ported Aug 15, 2010 · recently bought a 85 s10 runs great but idles really low, especially when AC is turned on and will stall at red lights and turns. Dec 25, 2015 · 2001 Chevy S-10 4 cyl Two Wheel Drive Automatic Truck stalls, has extreme low idle, sometimes stalls as I am driving down the road. Sep 3, 2007 · Re: 95 Chevy S-10 4. It has been going on for about 3 weeks now. Pressure while running (assume at idle) is higher than prime (zero vacuum). 1991 Chevy S-10 Rough Idle, Hesitation Engine Performance Problem 1991 Chevy S-10 6 Cyl Two Wheel Drive Automatic Filled Up, But Don't Think Bad Gas. it idles around 1500 to 1800 rpm and it is tearing the transmission apart. Thinking I might just adjust idle screw but wanted to see if any fellow S10-er could help out. 3 vortec. verry sluggish take off and will die at stops every once and a while. Oct 2, 2010 · 86 s-10 Blazer 2. In October it died again and was towed the dealer, distributor was found to be bad and replaced. I have done the following: Pulled codes 22(TPS), 32(EGR), and 34(MAF). Get used to it. These include: Head Jun 22, 2015 · 1. In this one I put the air filter cover on and rev the engine a couple times. Today it started idling very rough and almost dieing. When this issue occurs the IAC desired counts are much higher, can be over 100, and the actual IAC counts match the desired counts. R. 1 ltr 4. I have no engine codes (that I know of) and no SES light. When running at closed throttle idle, ie. It's not my pickup, it's a friend of the families. i am trying to fix a 1991 chevy s10 pickup for a friend of mine its got the 2. Bored . 3 that runs very rough and does not idle properly, New spark plugs, new distributor, Feb 24, 2008 · 2004 GMC 2500 4x4 6. 3 Vortech V-6Solair Sunroof, A. 1L V6 5 speed. s-10 and it runs fine. Is it possible a bad cylinder? There are no codes showing. Runs like complete crap at idle, and clears up as you get up into the RPM May 19, 2009 · 2004 GMC 2500 4x4 6. We've lined out some of the most common causes below. November it developed a rough idle, would almost stall and surge as well as occasionally stall Sep 8, 2014 · I have the 91 s10 2. After about 10-15 minutes, it suddenly begins to idle very rough, with rpms going up and down, and black smoke coming out the tail pipe (and I think from holes in muffler too). Before the motor was pulled it would stall when put into gear every once in a while, never threw codes, ran perfect other than the stalling. : off fast idle). I would suggest a comprehensive compression test with all plugs removed recording all pressures and then repeating the test on each cylinder after adding a Mar 26, 2021 · Buy Now!New Idle Air Control Valve from 1AAuto. Rough Idle. - Chevrolet 1991 S-10 question Sep 15, 2012 · Fired the truck up and it still idles rough with blinking CEL. Ive seen all of the stuff about Throttle/idle relearn, but everything seems to be for 5. The actual truck I had in high school. Idles - Chevrolet S 10 question See full list on 700r4transmissionhq. 3 V6 (throttle-body fuel injection) and auto trans, and I have a problem with rough idle and the engine dying at idle (will sometimes do it or threaten to do it at a stoplight, and I'll have to keep it going by loading the gas against the brake). Unfortunately, over the past couple months it's started to form a rather rough idle accompanied by a "jerky" or "bucking" feeling when accelerating, especially uphill. I've checked the MAP, TPS, & IAC. It will sometimes idle rough, and/or stall at red lights, stop signs, or when turning when the transmission downshifts to a lower gear that drops the RPMs. This will work for the chevy blazer and also the chevy S10 AKA Chevro Mar 11, 2012 · I have read nearly every thread on tbi surging idle, code 44's (lean o2), and everything in between. May 3, 2011 · This is my first start of this truck since around last november. Jump to Latest 1994 Chevrolet S10 LS 4x4 1986 Chevrolet Monte Carlo SS www. It's definitely getting worse. also if i stomp the gas it will cut power and die sometimes i have no idea what to do, can some one tell me what to do Aug 9, 2014 · The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > S10 S15 Luv Blazer 89 S10 4. Here's what I've done to try to fix the problem: - Replaced fuel filter. So we loaded it up on the flat bed and brought it to the shop. The first sign of the problem was the service engine light would blink intermittently when driving on the highway or revving the gas. 1998 chevy s10 2. I keep good maintaince on it. but plugs were clean still replaced sense they were original 89 plugs. Long story short , on a drive, coming up to a stop sign all of a sudden I noticed my idle drop way down. The car idles great until it reaches 195 degrees. 73 gears. So it's sat about 6 months. Jun 8, 2008 · 2004 GMC 2500 4x4 6. I think it would be best if you would post your Buick questions in the Buick forum where another Buick owner or mechanic can help you. 5 Auto and it cant hold an idle to help its life i recently changed the ICM, MAP, New plugs wires and timing done It ran fine the other night no issue idled fine and drove okay but this morning it starts but doesnt hold idle for longer than a minute No SES Codes Sep 8, 2014 · 1992 S10 Blazer 4. It was in the shop a while back and they helped seal up the vacuum, but said there a small leak through the throttle shaft. When your Chevy S10 has bad fuel injectors, you may notice a rough idle. My mileage has also definitely taken a hit since this has all started. The motor is out of an 88 1 ton pickup and is in a 89 1/2 ton suburban. 3L for about 6 weeks now. Truck always started fine. You didn't fix a thing. The engine runs terrible for the first 10 minutes from a cold start, after the engine warms up it runs perfectly, I have put plugs, plug wires, rotor button and oxygen sensor in last 6 months, I have replaced air and fuel filters. It will correct itself after about 5 seconds, can usually correct it a little quicker by revving. I put it into neutral most of the time at a stop light. ) i got this s10 i paid 450 for it. Number 1) Rough idle is usually caused by carbon buildup on the EGR pintle that keeps it from closing. com Jul 31, 2010 · 2004 GMC 2500 4x4 6. 3 Need help troubleshooting TBI/IAC Idle issue Web 67-72chevytrucks. now have idle issues. Compression. What an Engine Needs to Oct 12, 2011 · Pulled the whole dist out,while trying to remove the broken screw, blew out the screw hole,, So replaced the complete dist,cap and rotor. Sep 13, 2020 · My 4. 5L 5 speed 2wd pickup isn't running correctly. Got to where I was going and back home again. i know it needs replacing. Gone 12/2003 2004 GMC 3/4 Regular Cab 4X4 Dmax. 3 Rough idle/Stalling Jump to Latest 11K views 8 replies 5 participants last post by GEOD998 Jun 30, 2014 Nov 30, 2018 · 1991 Chevy Camaro Idles Rough Won't Hardly Run. -smells rich again-poor fuel mileage. Stopped and the whole truck was shaking, reaked like fuel. As the idle is rough due to the dead cylinder at idle. -NO check engine light thus far. Additional Rough Idle Causes. Its a 2. 3 200k+ miles 4x4 Problem: pulled code P0300 random multiple cylinder misfire Stalls slightly while starting idles very rough, almost dies at times smooths out at about 1800+ rpms Ok, here's the story. ) Apr 8, 2013 · 1994 S10 TBI 4. Mar 4, 2011 · 99 S10 4. Use throttle body cleaner. Apr 14, 2009 · -Rough Engine Idle-Engine Surging-Stalling Fitment: 1995-1997 S-Series Trucks (S10,Sonoma) Engine: 2. It's missing horribly. It can be pulled and cleaned. Last year I had the fuel pump go out so it was replaced along with the fuel filter. 5 ltr. Driving in gears 1-3 are bearable but in 4 and 5 there is little power and the truck surges, stumbles, and shakes awful. Do you have a scanner or how far is an autozone or advance auto? There is an electronic spark control module on the firewall that will cause some of the symptoms you are having too . ) Mar 31, 2005 · I have a 93 S-10 Blazer with the CPI engine. Here are some of the issues that cause the S10 to stall out. Sounds like it's running (barely) on 2 cylinders. The engine runs well, except for the rough idle once the engine has had a chance to warm-up a bit (i. 8 v6 in it last week. Cylinders 1 - 4 => ~ 160-165 psi each Cylinder 5 Jun 14, 2013 · I have a 1991 Chevy S10 with the 4. Once I put it back together it started to run rough. 98’ S-10 2. 1988 S10 4. I think this explains most of my rough idle and I have a new distributor assembly coming in a couple days. The issue started with it randomly bogging down when I would give it throttle. 3 TBI VIN Z that runs way too rich. 1 bottle of throttle body cleaner and 20 minutes later my truck ran like new. ) Feb 24, 2014 · 1991 4. Checked Plugs, Seems Jan 24, 2021 · I have a 1991 S10 Blazer 4. . The backfiring is intermittent when the motor is hot, and when the hill is a gradual climb. 3L CPI, AT, 2wd Jump to Latest 22K views 13 replies 7 participants last post by Bill Wheats Feb 27, 2009 Feb 3, 2022 · Have you checked the Idle Air Valve? Could be the pintle needs cleaning to seal properly. it dropped right in,, Sep 8, 2023 · Worn piston rings can cause oil to seep into the combustion chamber, leading to poor combustion and a rough idle. Feb 23, 2004 · Hi, I have a 91 Sonoma with a 4. max manifold vacuum, the fuel pressure regulator should reduce the fuel pressure by up to 10". The Engine Runs Terrible For The First 10 Minutes From A Cold Start, After The Jan 19, 2009 · 1994 Chevrolet S10 Blazer 4. Apr 18, 2019 · This is a video about rough acceleration rough idle low idle and possible stalling Sep 24, 2010 · Honestly, Ive seen many rough idle complaints caused by a simple leaking vacuum hose. 4l DOHC VVT- Acquired the hard way, 1991 S10 4x4 Extended Cab 4. Still runs like garbage. The most common reasons a vehicle shakes when idling is a misfire or bad motor mount. IF YOU ENJOY MY CONTENT BUY M Oct 7, 2010 · My s10 is 4x2, 5 speed manual, 74k miles. I have tons of rotational and up/down play in distributor shaft. 3L is having issues idling and poor throttle response from idle. 8 v6 and a 5 speed transmission hes had it for about 5 years now has always ran great. When thei happens sometimes it starts up first try, other times it takes 5 or 6 tries. It ran somewhat well until today, when it began dying on me when at idle. I have a 1991 K2500 with the 5. Also, once it dies, and im trying to restart it, it has trouble and i can definitely smell gas. I just replaced the Idle Air Co Jul 21, 2021 · I drive a manual 1995 4. Thought it could be old gas but siphoned it all and put it in my 4 cyl. Dec 3, 2012 · It does idle sort of rough, though. 2l rough idle and stumbles intermittent; 1991 Chevrolet S10 Estimates. Had to go rescue it from the side of the road this morning. May 17, 2010 · my truck runs rough at idle and at stops and at begining of throttle. Save Share. Its a V6 4. When driving around town, it accelerates perfect, it cruises perfect, but when I come to a stop, I have this rough idle. I let off the throttle and then shifted back into D and let it idle. Oct 11, 2010 · 92 k1500 - Rough Idle. As I said, it smooths out at higher Rs and doesnt sound like it has a chunky cam in it. Problem: excessive corrosion internally on the Engine Coolant Temperature Sens Nov 6, 2013 · It idles at right about 900 rpm when warm in park, when it used to be 650 or so. com Nov 27, 2017 · Some other causes of a rough idle. runs great above 1grand. I then put it in P and gave part throttle to get the RPM's up to 3000 - no audible misfires, backfires or sputtering. It is a constant vibration when at idle and only when at idle. At rest, idling still seems a little off and accelerating to high RPMs seems off with lower power and a weird noise that I didn't seem to notice much before. Mar 14, 2012 · 1995 Chevy s10, 2. Sep 8, 2019 · It can be very jarring when your Chevy S10 shakes when idle. 8L TBI lost power going home one day, very rough idle, dies when placed under load if you are lucky enough to get it to run long enough. Sort by Oldest first Apr 1, 2012 · fixed my last problem with fuel pump and idle, if i unplug map sensor it idles smooth, but soon as u put it in gear, it stumbles intell i higher rpm and then goes, but if im at stop sign it will want to die out if my foot aint on the pedal and i have no power got to feather the gas to get it moving then i can punch it and it will get power at the high rpm band Trying to remember, does your S-10 a regular carburetor or throttle body fuel injection, if it has the latter, it should have a water temperature sending unit, some where on the top front of the motor, in the water manifold, it should have a plastic snap on cap with, if I remember wright it should have two wires coming out of it, it controls the fuel / air mixture, while the engine is cold The most common reasons a Chevrolet S10 has rough idle are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. Jun 16, 2006 · Having a a major dilema with a rough idle / Multiple Cylinder Misfire on my 2001 Chevy S10. Josh, the budget mechanic Hawaii, shares his tips and tricks on rough Feb 23, 2016 · ok, so Im new on the forum and am also new to S-10s. i figured out what the issue was. It stalled twice before it finally began to idle properly. rough,surges, I did tear the number one plug wire boot in half, did a black tape repair,, distributor only goes in one way,right,,nothing was moved. I would get stuck at a light or intersection. I have done some basic tune things on it but I'm still hearing and feeling some roughness or unevenness at idle and also when I drive and hold a steady speed. I use detergent gas, had the throttle body cleaned when I bought it. I have a little update. 7 TBI with 306,000 miles on it. Dec 10, 2001 · If your plugs, cap, rotor and wires are all ok then I can give you the two most likely causes. Fuel. Shaky, would barely get up to 30 mph and the fuel mixture was rich because I could smell it from the muffler. Sep 3, 2023 · All the 2. 7 tbi with 115,000 miles on it. shows 3psi. * Oil is fine, coolant is clean * No smoke from Jan 14, 2016 · Normal idle IAC counts are typically around 30 and it always tracks the desired IAC counts. It got so bad that it would cut out at traffic lights. Im looking for ideas or anyone else who had this problem. 3 liter automatic S10, slightly similar issue upon starting especially when it's cold outside, but it can't happen when it's warm but for a shorter period. Mar 9, 2023 · By understanding the causes of a car engine that has a rough idle, you can resolve the issue easily. I've owned this truck since last spring. i did the first tune up on the truck. Mar 20, 2014 · I'm new to this forum and need some ideas from everyone. ) Jul 14, 2021 · 93 S-10 has taken a turn again. Today’s cars rely heavily on sophisticated electronic systems and computer controls, which can both cause and help diagnose idling issues. -it DOES NOT DIE now. Went to work the other day, and didn't realize until I got there that I was incredibly low on gas. Id really change that fuel filter if its been on that long. 2 engine with about 100K miles. 3l DOD, 2014 GMC Terrain FWD 2. Mar 14, 2021 · This is a tutorial on how to swap out an IAC valve in your 1991 Chevy C1500 pickup. Fuel issues are one of the most common reasons that a vehicle would stall out, that includes your Chevy S10. 5L Tech 4 engine in a 1991 S10 pickup with 5 speed manual transmission, 2wd, no AC or cruise control. EGR Valve Replacement Apr 20, 2024 · I had was sounded like valve train clatter, somehow the valve train clatter stopped and it had just a low compression in the #3 cylinder. Number 2) Cause of poor mileage, rough idle is that the CPI unit is leaking at the regulator. Aug 30, 2019 · If you own a Chevy Silverado and it's idling rough, you may be feeling frustrated. have replaced; ECM (mechanic shop placed 30A fuse in the 10A ECM panel) TPS (was coding) Aug 12, 2012 · I've got a 92 Blazer 4x4 4. 5L 4cyl 5speed manual idles rough and have to keep rpms high when driving, check engine light comes on. This motor is the 5. So put the fuel gauge back on and disconnect the vacuum line to the fuel pressure regulator. The ECM is telling the IAC valve to stay open and therefore the idle is too high. I am not an expert, I’m a semi professional ama 08-01-14 05:05 PM - Post# 2473627 Hello. Got the truck home and tried to start it again had to crack the gas pedal to get it to run if i don't it dose nt start. Dec 5, 2002 · The 1995 Chevrolet Blazer has 15 problems reported for idles roughly, stalls when stopped. (in process 4 bolt 350 vortec swap) 5 speed 4wd 02 Chevy Camaro B4C, LS1 V8 6 speed (former NC highway patrol pursuit car) 07 Saturn Outlook XR (the wife's ride) Customer: hello, my 1991 4. Oct 7, 2018 · I have a rough idle, stumble under load, and I believe a misfire somewhere. Can't figure out why the ECM is doing that. Dec 16, 2012 · ok. This occurs because the injectors are not providing a consistent flow of fuel, causing the engine to operate unevenly. Let’s begin with a quick look at the reasons. I recently did a frame-up restoration on it. it has a rough idle. If your S10 has this problem, many issues can cause it. Next step is the fuel pressure regulator as it seems like its just getting too much fuel. 3L V6 TBI. He got home and I looked it over, and it seemed to be fine, but still running rough. upon removing the head i found a bolt holding the intake valve open on cyl#4. just sitting parked, when the engine hits 205 degrees, it will start to have the rough idle problem. 3L Vortec S10 is great and is sitting at around 143,000 miles. Occasionally, when first started it idles very low and fluctuates until leveling out after a few seconds. 5 5 speed,hurst short throw for T5, 17's soon to be 4/4 H4 Hid 800k's- Rotting Away 92 Chevy S-10,SBC 350,Turbo 350-Sold 2010 Ktm 530 EXC May 19, 2012 · When the engine is cold, it runs as smooth as glass, but when the engine starts to get warm, the idle is rough, as though it has a miss or a stumble. Apr 17, 2020 · So, Injectors are holding. Apr 1, 2010 · 91 Chevy s-10,2. com http://1aau. 3 W CPI idle rough & stumbles Help, I have a 1992 S10 Blazer with the 4. Sep 16, 2009 · 91 S10 2. 3l CPI 4x4 Missing/running rough/rough idle/engine fan running constantly- After problem began owner replaced plugs, wires, rotor and cap with no change prior to bringing vehicle to me to look at, owner said he thought #1 wasnt firing. Exhaust Issues. I have owned since new a 1985 S-10 with the 2. upon removing the bolt i inspected the valve and Apr 1, 2013 · I have a 2004 s10 v6 vortec This morning I cranked it up and the idle was very rough between 1-2500 RPM, bouncing back and forth. yet i still have an extream high idle problem, any sujestions My truck starts up well, idles, and seems to drive (afraid to really take it out since this started) normally until it warms up. 3 TBI motor from an 89 S-10, and ever since I've had the motor put in (roughly 4000 miles), it idles quite rough, hesitates when at WOT, and bucks/backfires while going uphill on occasion. 2L Fuel System: Multi Port Fuel Injection only Part #'s: AC-DELCO #217-426 GM # 17112898 * Check with local GM/CHEVY DEALER to verify correct fitment! Measure (Only If Installing a New Idle Air Control VALVE) Aug 7, 2021 · Rough Idle No CHECK ENGINE LIGHT~~~~ EASY FIX, In this video i will show you how to repair your low idle problem quick and easy. This would also go along with your "runs great at speed" as vac leaks tend to REALLY rear their ugly heads at idle. Gone Oct/2001 2001 Chevy HD 2500 Reg Cab 4X4 8. - Replaced air filter. There has to be something wrong here: Idle speed needs adjusting; Loose or faulty distributor cap; Dirty fuel filter; MAF (Mass Air Flow Feb 26, 2023 · Overall, my 4. cleaned tbi. replaced idle control motor. I changed the spark plug wires, and plugs - and it ran a little better but still rough at idle and would not rev over about 2K. Oct 31, 2007 · mine was doing that, rough idle, but it also gave crappy performance when the egr valve was sticking i caped it and it throws a ses light after about 10 minutes i just iggy it, it did help, the ses code for a 91 tbi 4. 3L VORTEC (vin W) CPI SUV and have a problem with:-rough idle and higher than usual idle RPM-Engine stumbling/hesitates off idle and surges at approx 40-55 mph. Nov 17, 2004 · It would not be a vacuum leak. With a fuel injector that is not properly atomizing fuel properly, your S10 is going to have a difficult time idling. Apr 9, 2018 · Customer complaint bad gas mileage and a surging condition at idle, sometimes. 1992 Chevy S10 rough idle issues and engine stalling after driving. Currently has 218,000 miles. Now it's idling rough and stumbles a bit. ) Is your car shaking or vibrating while at a stop? Watch this video to learn the main causes and how to diagnose and fix them. 3 and DBW Sep 10, 2019 · Chevy S10 Stalling Problem Causes. II Intake, Xtreme White Face Gauges, Infinity Kappa 462. In this article, I will go through all the possible rough idle causes together with an explanation of how you can test them. It would surge some, and the gas pedal felt intermittent. As a side note it will run off starter fluid pumped through the throttle body all day if you wanted to. On t Oct 7, 2008 · 2004 GMC 2500 4x4 6. I'm going to check the PCV valve next as suggested, see if that might be another problem. to/ic/1AISC00031The idle air control valve keeps your engine idling properly, If the valve get Mar 14, 2014 · I have a 1997 chevy s10 4. Past Rigs: 2000 Chevy 2500 Reg Cab 454 3. O2 sensors Hopefully, your truck’s O2 sensor is this easy to get to. 2 liter, standard transmission, 248,000 miles the truck has run fine up till this time. Jan 2, 2022 · Hi, I have a 1988 S10 2. -Vacuum at idle 15”-Under hard accel engine does NOT misfile and seems to run ok but as soon as the throttle is relaxed it again begins to surge. Hey, It's wortha shot, wont cost much and it eliminates a possible problem. net. The culprit in mine turned out to be the idle control valve. Now it was idling extremely rough, shaking the vehicle visibly. As much as I would like to help, I am not a full time mechanic. Normally it wo Dec 21, 2017 · I must be missing something here, but I am about out of ideas. Take the truck sumwhere to have the fuel pressure checked, it is supposed to carry a certain level of pressure and if it doesnt carry what it should then its a fuel pump, i replaced one on my old s10 (4. ) 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. I have done all I can think of to this point and need some others opinions Aug 22, 2008 · My 2003 s10 developed a rough idle. When it is running the idle is really rough. Since I bought it about 2 months ago it would start up kinda rough till you rev it a couple times and it would smooth right out and warm up normally till the idle dropped to normal. Your Chevy S10’s exhaust system has three functions. Its crazy because I can barely feel it through the steering wheel but the fram is shaking constantly. Took it off and the tiny gap the valve has in its released position for idle was completely clogged with gunk. upon furthur diagnosing the headgasket let go (207xxx miles) so i figured screw it and i reasealed the top end. I went through the same laundry list you did - key cyl, ignition box (what the key cyl fits into) - that much was to get the ignition to work correctly. 7 350 TBI. Mar 17, 2004 · 2000 Black Extended Cab Xtreme S-10 4. I have replaced spark plugs, spark plug wires, o2 sensor, and the catalytic converter, now I get codes p0404 and p0405, which I believe are egr related. A mechanic will systematically check the relevant components of your engine and its emissions system to isolate the cause of your rough idle. About 1/16 - 1/8" of rotational play at the tip, which is roughly 3-6 degrees. 1992 Chevy S10, 3. Nov 11, 2010 · rough running 2. When I hit the throttle, there is hesitation, but then it picks up. I had a long-block overhaul done (& actually had to replace the block). E. 5 4 tech engine. Ive replaced the IAC and TPS thinking that I may have messed them up somehow but that does not seem to have fixed my issue. The issue is this: lately, it simply will not start without starting fluid. 10 gears. Once it is warm, the idle starts going up and down and in traffic sometimes the car wants to move forward. Apr 2, 2022 · I have a '93 Chevy S-10 with the 4. 7 V8. 1991 chevy s-10 6 cyl two wheel drive automatic filled up, but don't think bad gas. The most common cause of a rough idle is misfiring. - Cleaned and inspected IAC valve. Jun 16, 2010 · 2004 GMC 2500 4x4 6. Runs fine in town. Check and clean the air idle valve. I'm looking into that. Jun 8, 2010 · 2004 GMC 2500 4x4 6. 3L TBI - Idle troubles Good Evening dgoad, it is not uncommon when engines have vacuum leaks to find exhaust valves get a little burned, which could well be your problem. 3L Chevy S10 and have had some recent issues with idling. 0l, 2009 Chevrolet Tahoe 2wd 5. ) May 11, 2008 · The injectors also ohm out within specs, although a couple are close to the tolerance range. The items listed above are the most common causes of a rough idle. then about a month ago it started dying when Jul 17, 2019 · 1. The roughness is not major, just enough to notice and be very annoying ! May 27, 2010 · It was idling noticeably rough as expected. 3L with 100K miles on it. 3L V6 engine, and it very suddenly developed this loping, stuttering idle problem. needed a little work but the issue it has i cant find the cause of. Gone 4/2005 2005 Chev 3/4 Regular Cab 4X4 Dmax. 3l TBI. Stall during stop would be some of the stall or surge I mention, also during misfire at Feb 16, 2011 · I'm working on a 2000 Chevy S10, with the 2. Mar 4, 2013 · Hello, I’m new to the S-10 Forum but not to the truck. Runs very rich at idle and smooths out at 1,100 rpm. 8tbi 5spd 2wd and after I start it it will idle fine but randomly go to a low rough idle after a while until I rev it high agai 1991 Chevrolet S10 - Intermittent rough idle Close Dec 27, 2011 · even after getting to operating temps it still lopes slightly when at idle, went into field service mode after operating temp was reached and the engine light would flash stay on a sec on stay off a sec like norml for closed loop then suddenly it would start flashing real fast like it switched to open loop, still idled rough the whole time, i Oct 31, 2010 · Alright, i had posted before about my surging idle. Shortly after buying it I Jan 31, 2009 · 2004 GMC 2500 4x4 6. When minimum idle is higher then normal ecm idle it can take even longer for idle to drop back normal ecm or minimum, whichever is higher. Finally code 33 shows. 5L and 4 speed. --Mike Nov 5, 2008 · 72 Chevy Custom Deluxe fully restored. Remember, a vehicle needs air, fuel, and spark to run. I have a 1991 S10 truck with 126,000 miles on it. if vacuum was leaking you would have a low rough idle. 86MonteCarloSS. Here are ten of the most common causes of a rough engine idle. I have been having idle issues for the past 4 months. Whenever I come to a stop, it surges hard, and will die if I don't give it a little gas 1991 Chevrolet S10 Blazer - Surging at idle, struggles under load. Dec 6, 2004 · I have a 1989 S-10 Durango with a 4. It feels like a misfire. Feb 25, 2007 · This is a bit late but I’ve read this thread several times trying to figure out my truck so wanted to put this here. If the above suggestions don’t fix the problem, try these out. 3. The truck idles rough and is running really rich. Feb 17, 2014 · 96 s10 2. I let it keep idling like this (RPM's about 500). I have searched the forums and found similar threads but nothing seems to fix my problem. Found the idle control valve to be gummed up and a bad connector. and now my newest addition Alpine Jul 9, 2014 · My 89 S10 4. I have a 1991 Chevy Blazer TBI 4. Thought maybe knock sensor, but that does not account for the rough idle, I think. Sometimes it runs as if it is starving for something, fuel, air whatever, like it's gasping for something. checked plugs, seems to run ok after 50mph and above, speedometer also bounces or won't show real mph when accelerating from a stopped position Dec 21, 2008 · Surging & Rough Idle - 1994 S10, 4. Those gears are almost unusable. Stalls at idle and coast. Average repair cost is $590 at 155,150 miles. This is my dad's tru8ck and he was driving and it suddenly started to run rough. 1991 Chevy S-10 Engine Running Rough When Cold I Have A 1991 Chevy S-10 With 4 Cyl 2. Getting back to no crank - do not take this truck on a camping trip. It releases exhaust gasses behind the truck, scrubs pollutants via the catalytic converter, and helps the engine adjust the air/fuel mixture via O2 sensors. Feb 17, 2020 · 1991 K5 TBI 350 with SM465. 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. 5cfp 4x6's, Infinity Reference 6002si 6 1/2's Street Scence Brushed Aluminum Grille and Street Scence Brushed Aluminum Bowtie, Xtreme Custom Floor Mats by Lloyd. When the problem first began, it felt like just bad gas. From your info, you have a bad diaphram on the brake booster. within the last year it startede dying when you push in on the clutch but always started back up just fine and ran great while driving. 2L engine. Sep 18, 2010 · I have a 1991 Sonoma, 4 cyl, 2. I pulled the plugs and the drivers side bank dont seem to be burning clean (passenger side are nice and brown). Already checked/changed Did a compression test, all cylinders and they were consistent at 190psi. 2 Liters idle rough. Feb 2, 2011 · Well if the service engine soon light comes on its throwing a code. When it dose it will idle very low and dies out So off to auto parts place. Bad distributor gear. Fiberglass Bed Cover, SS Mirrors, Clears, Herculiner, K&N Gen. The part helps your truck maintain a consistent idle even as the engine takes on extra work. 3l with a 5 speed - Newest project I picked up to fix up for my son (hopefully with some help from him on the bodywork. In this article, we'll look at some of the most common causes of a rough idle in the Silverado and how to fix the problem. Sep 21, 2015 · Guys, I have been having an intermittent problem with my 2001 S-10 4. Nov 22, 2009 · sounds like a fuel pump, or even a dirty fuel filter. The Engine light came on and stayed on full time. While the fundamental causes of rough idling remain similar, modern vehicles introduce additional complexities. Dec 17, 2009 · 91 S10 rough idle, stalling ALDL problems My 91 S10 2. So, the truck is a 92 k1500, has 20,000 miles on the new GM crate 350, new throttle body, rebuild trans about same time eng was put in. Feb 26, 2008 · I bought a 1990 Chevy 1500 pickup several months back. Jul 6, 2010 · I had the same exact problem with my truck, rough, low idle, hard to start, and sometimes shut off. Took it to the shop, check on it in AM. 2. 3 CPI Votec engine. i just bought the truck and havent done anything to it, so the previous owner must have dropped it in the intake. It seems to idle very unevenly, almost as if there's a cylinder misfiring, but it goes away when I get on the accelerator. I have checked all vacum lines and replaced the oxygen sensor on the exaust, also replaced the intake manafold gasket and the Idle air control IAC, I have run OB1 diagnostic and only code 12 present. 5L "A" engine running rough at idle and when slowing down at stop signs or just slowing the engine rpms down after getting into 4th or 5th and cruising along at 25-35mph. Did I do something wrong? Normally it idles around 950-1050 RPM, what has been happening is that it would start, idle high, around 1500, then drop to normal, and then start sputtering and RPMs would fluctuate anywhere between 750 on the high side, all the way to 0, stalling the motor. After replacing numerous parts, including fuel pump and MAP sensor the same issue contin In this Video i clean the mass air flow sensor on a chevy blazer to fix the rough idle. Sep 18, 2015 · Hello, we just bout a 99 blazer it cruises good and starts good but it has a rough idle, so rough i can feel it in the car. 3L TBI Rough Idle Problem Hello, I have a 1988 Chevy S10 Blazer with the VIN Z 4. Things i have done: Sparkplugs, wires, cap and rotor cleaned egr, iacv, maf oil chnage sprayed around with carb cleaner for vacuum leaks Aug 25, 2021 · -from a cold start, truck starts and idles fine. My Niece Was Driving My Car When Is Suddenly Lost Power And Now It Will Barely Run At An Idle, Dies Or Won't Pull Jun 23, 2010 · The vehicle is a 1990 Chevrolet Caprice TBI L05 I have a warm idle problem. Sep 26, 2019 · Chevy S10: Bad MAF Sensor → Symptoms and Causes. Cleaning may help your idle, just something else to look at. The truck misses for about 30 seconds after start up when the outside temperature is below 50 degrees. One out of five times the idle will seem to fall out when taking it out of gear and coming to a stop. just starts to shake a little and have low/rough idle. 91 have a 1 wire o2 Aug 11, 2017 · I have a 1994 Chevrolet Blazer S10 4. Ive done, egr valve, fuel filter, water temp sensor because had no reading at gauge, cap rotor, wires and plugs. 3 tbi, that has a surging issue. The blinking would stop after a few minutes and the light would go away. There is no knock at idle and it idles rough. It threw a code 45 and I replaced the 02 sensor. Checked Plugs, Seems May 28, 2012 · 93 Chevy S10 ext. 3) and on my current s10 (2. Dec 21, 2009 · I've been having problems with my 2. May 2, 2014 · Hi I have a 1991 Chevy WT 1500 2wd 4. e. I have a 1991 c1500 5. I am trying to solve this rough idle problem. I just got a 93 s10 with the 2. I have a 1991 Chevy S-10 with 4 cyl 2. It needs them in the right quantities and intervals, or it won’t run right. Cold start idle is up and down for about a minute until Closed Loop kicks in and then it's fine. 1991 Chevy Corvette V8 Two Wheel Drive Automatic Recently the Service Engine light started coming on when I reached speeds of 55 or 60 Mph for about a mile. 3L TBI 4x4 I've had this issue for a while now. 2l that has been running really well but about 600 miles ago it developed a nasty rough idle. 02-23-10 03:57 AM - Post# 1867778 In response to wlfee69 Welcome to the site. 3 s-10 is running really rough, the idle goes from high idle to low idle back to high idle ext. Runs fine with AC on just at stops it bogs down and stalls on me. No change with idle. Mar 30, 2008 · Yes the minimum idle should be lower then the normal ecm controlled idle, analogous to normal idle higher then minimum. The truck will idle so rough I have to keep it running, and then eventually my RPMs will Spike and it'll take off on its own go back to regular idol. cab. Like. Gone 9/2006 2005 1/2 ton Silverado 4dr 4X4 Gone 3-2007 It started when I was slowing down from the interstate, noticed spark knock, and a rough idle thought maybe bad gas, put in 104 octane, no difference. 2), one day they run normal, and the next day its runnin rough-fuel pump lol Feb 5, 2011 · My truck is a 1991 V-1500 Sub, 5. fuel filter Nov 11, 2010 · Second video. When I killed the engine for about a min. vwwi wcw jawk wboh vnf kcvm wkmk unfk mftk wayrz