96 Blazer Rough Idle
5k rpms (way high) for about 5 seconds, then settles to around 500 (a little low from what I was told). Happens more when it is cold/wet and when tank is below 1/4 full. In my neighbor's Blazer, the PCM wasn't even registering a P0300, but it was obviously running very rough (at idle that is). 96 jeep grand cherokee stalls on idle!!! cheech007 Jeep was tuned and major service performed in the first week of jan 08. idle surge, running rough, guzzling gas - 88 Ranger Was searching the interwebs, landed on that thread, unfortuantly it's like a 2003 Ranger. Learn about this problem, why it occurs, and how to fix it. 28 of the Toyota Electrical Wiring Diagram Manual. The mileage has dropped to 33-35 mpg from the usual 39 to 42. Chevy Vortec 4. Rough Idle. I've been experiencing rough idle on the old 96 Ford Taurus OHV 3. P0122 Throttle Position Sensor/Switch A Circuit Low Input OBD-II Trouble Code Technical Description. Diesel Ops is committed to providing our customers an unparalleled shopping experience. Running bad at idle and stalls if I press the throttle. When I start it, the engine instantly revs to around 2 - 2. according to the book its supposed to be between 800 and 1200 hundred. ATTN: All with GM 3800 Series II (including Supercharged) Engines! If you're having issues with it starting or idling, and it keeps getting worse, i can almost GUARANTEE that the problem is your FUEL PRESSURE REGULATOR !. i have a 96 xj6 that idles rough just sometimes especially in the morning. Many agencies have begun publishing numerous OMB control numbers as amendments to existing regulations in the CFR. The easiest thing to test for is the vacuum leak. How do you adjust the idle on a 95 Chevy Blazer 43 liter V6? You'll know if your EGR valve is stuck or malfunctioning because your car will experience symptoms like rough idle and bucking on. I tihnk the kit cost me $35 or something and the truck ran alot better afterward. Also, PCV valve vibrates like crazy even after I replaced it. When it's cold, it will usually stall if I even look at the gas pedal. all i can say is look for air leaks first then do carb then do cam. Trail Blazer Offroad Vehicle pdf manual download. 3 misfire fuel injector leaks. When I'm accelerating and get to required speed my RPM gauge either drops and steadies or jumps up then steadies back. What should I do? I got it for free and this is the first problem I've had since I got it in 2009. If I listen to each exhaust, one seems like it is rougher. Why does Chevy blazer have rough idle and engine shake at idle? from cyl #6 came loose I have a 96 Camaro RS 3. I have since rolled my tube ends and roughed up the surface where the t-bolts clamp on the pipe. An idle stop screw is set at the factory and then covered to discourage tampering. The Check engine hasn't been back on since I cleared the code but, I have a rough idle with occasional Surge and bad fuel economy. Don't forget about the 'big' vacuum hoses like the brake booster and PCV. I had a slightly high idle problem and a rough idle at times. Whenever you're going to want Chevrolet Blazer parts, it's a good strategy to find the best-reviewed aftermarket and OEM parts on the market - and by shopping at PartsGeek you also see the best prices online or offline, along with world class service. Until this mourning when it would not idle at all until i started and held the gas down above idle speed for about 60seconds. The Blazer is equipped with an exhaust gas recirculation valve, commonly called the EGR. 3 engine is known for: bad idle air control valves and throttle control switches. When your engine idles rough and the exhaust has the smell of raw, unburned gasoline, it is suffering from a rich condition or or incomplete combustion. It is/was a well known problem that the EGR ports from the exhaust ports up the the EGR passage in the intake would get carbon buildup in them and periodically small bits of carbon would break loose and get caught in the EGR valve, thus it can't fully close when commanded (at idle) and thus the open valve causes a rough idle. 3 vortec vin w rough idle 1 Answer. Reader Question. Lights flickering at idle (engine, replacing, Chevrolet, battery) Idle is a little rough but not real bad. Gasoline Leak: Fuel injector can crack or break, which will cause a gas leak. 4L 4-cylinder engine (RPO […] October 3, 2016 —. not the problem it has to codes p0171 and a pending p1133 with are bank one codes for 02 sensors ive never seen a 02 sensor cause a ruff ide could this be?? my secound thought was low fuel presure at idle it is a 53 witch should be great and 60 with engine off so. i replaced the plugs and cap and rotor. 3 vortec vin 4 it is idling rough & fouling plugs with black Sutt but is will rib up acts like the mass air flow sensor but don't have one I changed the o2. Also service engine soon light comes on when below 1/4 full but goes away after fill up. As the others have said, take any plastic shrouds off the engine and look at the fuel rail, injectors and fuel line for any leaking fuel. Its a whole different animal now. Does this look like an easy fix like cleaning with carb spray or Seafoaming it?. i have done just about everything i can to it. No check engine light comes on. CK5 has since expanded to include the C/K series GM Truck and Suburban as well as past and present GM models. With a fuel filter, spark plugs, air filter, PCV filter, and distributor ignition rotor plus all applicable labor charges. BlueDevil products are safe for your vehicle and can remain in the system until your next fluid change. Post truck shows, events and gatherings here. If any of these is lacking, the engine may stall. If you have a vacuum leak that was brought on by a bad vapor canister purge valve, then you will probably have difficulties starting your vehicle. Learn what does P0300 Chevrolet Cylinder Misfire Detected Random Cylinders means, location and how to repair?. 2 Hesitation & Stumble. If your vehicle is suffering a rough idle condition (after replacing the spider or fuel pressure regulator), take a look at the section: Spider Fuel Injector Assembly O-ring is Not Leaking Vacuum, What Next?. Any assistance greatly appreciated. The cause is often a problem in the idle air control system. if you havent already, check the simple things, i would make sure plugs and wires are all good, make sure plugs are all in good shape and gapped to. 1964 Chevrolet Chevelle Base. January 2001 Dear Consumer: Thank you for contacting the Center for Auto Safety (CAS) about your Chevrolet S-series pickup, Sonoma or S10 Blazer, GMC S15 Jimmy, and Oldsmobile Bravada. It's a '95 Blazer 4x4 4. After it warms up, it accelerates without hesitation. The internal combustion engine requires a precise mixture of fuel and air to run correctly. iATN is the world's first and largest online community of automotive professionals, where automotive technicians and other auto industry pros perform real-world vehicle diagnosis, and discuss theory, shop management, and other industry issues among their peers. 3 i recently picked up on a trade. Its free to use too!!. one day went to start and idles very rough and stalls. Customers may describe a 20 to 30 second rough idle following the restart of a heat soaked engine. If is is hard starting, idles rough, and the brakes are hard, check the EGR. ttt86 wrote:Purchased car today and noticed it runs rough at idle intermittent. The engine has started to idle very high. 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. I have a problem with it missing/running rough after/during it rains or after it has sat for a few days. Because it bypasses air, it's also called an air bypass valve. When I start it, the engine instantly revs to around 2 - 2. 3 Vortec 212000 miles Drove about 500 miles this weekend (200 there, 100 running around and 200 back) and the car was running great until I finished the last leg of the interstate driving. 5 lb/m (pounds/minute) which is over 13000 grams/sec. Chevy blazer s10 hard to start and rough idle? Terje Strand. BlueDevil Transmission Sealer is guaranteed to form a permanent seal. 3 vortec vin w rough idle 1 Answer. 3 CSFI idled rough also. The complaint on this Blazer was that it had a misfire that was bad enough to make the tach jerk. The Paperwork Reduction Act of 1980 (Pub. Gasoline Leak: Fuel injector can crack or break, which will cause a gas leak. View and Download Polaris TRAIL BLAZER 330 owner's manual online. out of this one and into a '96 Blazer. (blown engine) The engine and tranny was replaced. 96 Blazer sometimes starts rough. Blown Exhaust Manifold Gasket Symptoms. Was running fine,idled a little low. I was checking my crankshaft position sensor omh's. Cleaning out the carburetor to remove carbon deposits is probably a good place to start. I have been working through rough idle and crappy mpg for quite awhile. Or, the engine will cut out while driving, with the ABS and Brake dash lights coming on for a couple seconds. in a rough idle and high HC dur-ing an idle emissions test. Strangely enough I did some online research and found a post of a similar problem and it related to a 4wd vehicle that had also had … Continue reading "2001 Chevrolet Blazer,4WD, Rough Run, Code P0122, Transmission Replaced Last Year". Categories: American Classic Cars | Muscle & Pony Cars. #2 went bad. driving down the road it does fine, never sputters or struggles, but once i stop at a light it starts the rough idle. I have a 95 blazer vortec "W" engine. The throttle body controls the amount of air the engine takes in, and when it gets dirty, the engine can’t idle smoothly. When this occurs, a voltage spike causes the voltage regulator to reset. Different owners seem to describe this problem using a variety of expressions. I'm still working on my 95 s10 blazer 4. This is the place to talk about brakes, suspension, lowering, wheels, tires, basically everything that affects your car's ride and handling. by Kyle McFadden. That condition and lack or records are a concern to me but at relatively low miles and asking price at KBB in my son’s budget I still want to look at it as we have tight schedule to get him a car. Polaris 2005 ATV Owner's Manual. In drive thats correct. Shop safely with us online or call 888-844-3393 and buy the quality part your car or truck needs today. Will start back up in a minute. I will be doing a tune up over the weekend since it is due, which is fairly easy with no plug wires etc just the ignition pack over the plugs. Wondering if one of my injectors is bad. If the engine temperature sensor fails, it sends the wrong temperature signal, and the result is a fuel mixture that is too lean, which makes the car run rough. What I mean by rough idle is the fact that the RPM's drop and fluctuate when I'm stopped at a light for example. This case study is on a 1996 Chevrolet Blazer with a 4. 3 vortex 6 cyl. 3 runs good not a skip only idles rough when stopped Replaced 1 cap 2. all plugs ac delco 0. Guess what? My rough idle (sounded like it had lost a cylinder or two) that was happening on a restart disappeared. Diesel Ops is committed to providing our customers an unparalleled shopping experience. it sprays out and for lack of a better word floods it out. Pay attention to low idle or stalling. hey john i stay in indianapolis and have the above rough idle at any rpm below 900 and hard cold start issues with carbureted 1968 307. We treat our customers like family before and after every sale. I replaced TPS still the same unplug the MAF it cuts off some times other time it will conversate for it once unplug. I hv a 2001 blazer, wouldnt start one day and then the next day starts, we replaced cap, rotor, wires, and finally replaced fuel pump even though we could hear it kick in, it just wasnt pressure of 60, more like 15, so i fixed it myself for $240 instead of deal price of $800 and thank god it has been working over a week. I was 150 miles away from my dealer so I decided to just drive it home the lamp wasnt flashing. This WheelZine article tries to list down the possible signs and symptoms of a bad idle air control valve. Also, PCV valve vibrates like crazy even after I replaced it. i put new cam, new cdi, new carb, new fuelpump, and nothging fixed it. Sorry no easy answer. Signs and Symptoms of a Bad Idle Air Control Sensor by Richard Rowe Connected to the engine's primary air intake valve (the Throttle Body, or TB), the Idle Air Control (IAC) valve is responsible for making minor adjustments to engine airflow. 5 lb/m, running rough or smooth so I don't trust the scanner. 273K miles on it. 96-511) requires Federal agencies to display an OMB control number with their information collection request. 95 Rough Country 6 Lift Kit Fits 11-14 Ford Super Duty F250 4wd Diesel Vertex. Fuel trims at idle and at cruise were in a fairly normal operating range of -5 to +9. My Dad's 85 Chevy Van with the 4. Since the oxygen sensor output helps control engine timing, combustion intervals, and the air to fuel ratio, a bad sensor can disrupt these engine functions, causing a rough or irregular engine idle and other engine-related issues. Usually this backs off when you hit the brakes. Many have a slightly rough idle could be from many things: injectors get buildup of waxy crap from cheap gas, cap/rotor, plugs, wires, fuel filter, sensors degraded (O2, MAF, temp, etc), vacuum leak, idle air control valve, clogged air filter, and each has to be looked at. 0L) and LO5 (5. Why does your 1998 blazer run rough at low idle? The 1998 Blazer could have several problems causing rough idle. Checked for fuel in upper intake and nothing is there. Fits Suburban 00 Suburban Sale. 1996 blazer V6 4. No matter what you're driving, we have the right 1964 Chevrolet Chevelle Base for your vehicle. Shop our vast choice of Fits Suburban 00 Suburban available to be purchased. 7 Vortec 180,000K. Commonly called an idle air control (IAC) valve or idle speed control (ISC) valve, this device is used on many cable-operated throttle bodies to regulate the engine idle speed. 92 s10 sudden high idle after backfire. Setting IAC (Idle air control) valve I saw this video , and wonder about his words of "wisdom. I recently spent a lot of time with a vacuum gauge while attempting yo sort the idle mixture on my ’65 Old’s 330 V8 engine. Drove it 150 miles home and it runs great on highway at 50 to 90 mph. 2000 Blazer Idle is Too High Then Goes Down my 95 blazer when coming to a stop and braking it idles high and rough sounding. Power/Fuel. Service engine light flashing on my 4. He is an ASE Certified Master Technician and has bruised knuckles to prove it. Hello, I have a 2005 Honda Civic Hybrid that I bought off my parents a year ago. This is the website for EricTheCarGuy! Here you will find answers to your automotive problems. it sprays out and for lack of a better word floods it out. 3L (T), and the check engine light is on. 4 k3500 truck that idles rough. I have a 1987 nissan maxima, has been running great and has 240000 miles on it. 7L) engines. Different owners seem to describe this problem using a variety of expressions. Shop safely with us online or call 888-844-3393 and buy the quality part your car or truck needs today. the donor was 2004 s10 - no computer i can't test this engine in the car. 2001 S10 Blazer/ check engine light is flashing / means "misfire" according to manual. In fact, if you've noticed a rough idle, stumbling initial acceleration or even stalling – all when the engine is fully warmed up – a dirty throttle body could be the culprit. 3L and it's driving like a dog—poor acceleration, hesitation, or a surge and you suspect a fuel problem, you may be partially right. - Answered by a verified Chevy Mechanic. 2007 Recon - Rough low idle - help! I have a '07 Recon I picked up this weekend and it has not been used too much except for the guy checking his cattle in his small pasture a few times a week. Stalling when it's cold can also be caused by a fuel leak problem inside the carb. 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. it also seems the longer i sit the worst it gets. BlueDevil products are safe for your vehicle and can remain in the system until your next fluid change. Strangely enough I did some online research and found a post of a similar problem and it related to a 4wd vehicle that had also had … Continue reading "2001 Chevrolet Blazer,4WD, Rough Run, Code P0122, Transmission Replaced Last Year". most of the idle air control valves you can take apart and clean the carbon out of them as after a long period of time the pintle valve in them will carbon up and start sticking. I got a 2002 chevy blazer 4. the check engine light is on all the time but when i punch the gas it flashs which mean a misfire. Since the oxygen sensor output helps control engine timing, combustion intervals, and the air to fuel ratio, a bad sensor can disrupt these engine functions, causing a rough or irregular engine idle and other engine-related issues. among full size Chevrolet K5 Blazer and GMC Jimmy. We noticed it more often as the nights have been getting cooler and the summer has come to a close. Make an offer! 96 chevy blazer. What complicates a rough idle/misfire condition is having the PCM not register any specific misfire codes. Idling and slow speeds it sounded and felt like it had a really aggressive cam in it. Threads Tagged with backfires. The Paperwork Reduction Act of 1980 (Pub. We noticed it more often as the nights have been getting cooler and the summer has come to a close. If the valve fails or has any issues it can cause the idle speed to be thrown off. After surgery the engine starts good, drives good but: the engine have rough idle - only a little. Page 2: Rough Idle After Replacing 'Spider' Injector or Fuel Pressure Regulator. Does it idle rough? Check your vacuum with a gauge if you can. This WheelZine article tries to list down the possible signs and symptoms of a bad idle air control valve. It shakes until I pass the 1000 and stops. Post truck shows, events and gatherings here. The codes that come up are PO102 and PO341. Looking for a 1994 Chevrolet S10 Blazer Idle Control Valve? Get yours at Wholesale Prices and Free Shipping over $50 only here at AutoPartsWarehouse!. Find your perfect car with Edmunds expert reviews, car comparisons, and pricing tools. It's a '95 Blazer 4x4 4. 7 Vortec that I think I've figured out. Forum discussion: How much should a tune cost on a '96 Chevy 4X4 Blazer. I had a slightly high idle problem and a rough idle at times. the idle air control valve is a valve to itself although it does attach to the throttle body and the air passages for it are made in the throttle body. The 1995 Chevrolet Blazer has 15 problems reported for idles roughly, stalls when stopped. I suspect that it is a. Ford Explorer?, Automotive, 8 replies 2000 chevy pick up problems, Automotive, 5 replies. A rough idle or misfire may be noticed on some 2014-2017 Encore, 2011-2015 Cruze, 2016 Cruze Limited, 2012-2017 Sonic and 2013-2017 Trax models equipped with the 1. I replaced TPS still the same unplug the MAF it cuts off some times other time it will conversate for it once unplug. What I mean by rough idle is the fact that the RPM's drop and fluctuate when I'm stopped at a light for example. I read that if the TPS is loose or bad, it can make the truck idle rough, but the scanner doesn't show anything there or any other sensor for that matter. Problems with idle speed—things like slow idle, fast idle, rough idle, or stalling after idling for a few seconds—are symptoms that something is wrong with your engine. Idle air control valves open to allow more air to "leak" into the intake, raising the engine rpms, or close when not needed. I was checking my crankshaft position sensor omh's. Chevrolet S10 Check Engine Light/Rough Idle Due to Stuck Open EGR Valve - 4 reports. I have a 1996 Blazer with 4. 89000 miles, truck runs great, always starts, etc. Free Same Day Store Pickup. Either it won't start for awhile or crank on it for awhile, runs rough, almost like not getting enough fuel and then is fine. While there are a variety of reasons your Chevrolet Blazer 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. 3 does the camshaft have to be aligned with the balancer? And does the distributor have to be on #1 spark for the right ignition timing my blazer idles rough on low RPMS, but smooth on high RPMS, it started this when i had to remove the distributor to fix the a bent valve in the head, when i but it back it started acting up. The Check engine hasn't been back on since I cleared the code but, I have a rough idle with occasional Surge and bad fuel economy. 3 with bad engine and tranny. it now starts but has a very rough idle and chokes when throttle is open it seems to be running rich as the plug is oil fouled. Engine Rough Idle After Warm Up. It is because rough idle when warm can either be caused by one faulty component or through series of problems. In drive thats correct. ACDelco offers a full line of premium auto parts, including for tiers of variety for nearly every make and model. BlueDevil Transmission Sealer is specially formulated to restore dried, cracked or shrunken seals and gaskets in your transmission without harming the transmission. 2000 Chevy blazer (s-10) 4 by 4. If the engine temperature sensor fails, it sends the wrong temperature signal, and the result is a fuel mixture that is too lean, which makes the car run rough. 3 misfire fuel injector leaks. 96 chevy blazer ls loss of power at a low idle? - Answered by a verified Chevy Mechanic. My 96 blazer shows at least 40 all the time and 60 while driving. The idle of a car engine is kind of like a human heartbeat: You can tell what shape it's in just by listening. Hello! I just got a mx5 (Miata) NA (1990) and I noticed that the voltage at idle is quite low, 12 - 12,5. Running bad at idle and stalls if I press the throttle. Over 6,000 Automotive Torque Specs. 3 idles great but upon acceleration it starts to surge, changed just about everything, fuel pump,cap rotor, wires, plugs distributor injectors, crankshaft, cam, throttle pos. Its free to use too!!. What causes a 1991 Chevy Blazer S-10 to idle rough and stall except when the AC ac is on? What makes your 96 Chevy blazer ride so rough Got new shocks and tires? idles rough, and the. Add mammoth stroke and big-port heads, and the Rat returns gobs of torque. Customers may describe a 20 to 30 second rough idle following the restart of a heat soaked engine. I tihnk the kit cost me $35 or something and the truck ran alot better afterward. could this be a throttle position sensor problem. Also for: 2008 trail blazer 330. Learn what does P0171 Chevrolet Fuel Trim System Lean Bank 1 means, location and how to repair?. 3 Vortec 212000 miles Drove about 500 miles this weekend (200 there, 100 running around and 200 back) and the car was running great until I finished the last leg of the interstate driving. Gasoline Leak: Fuel injector can crack or break, which will cause a gas leak. Save up to $5,562 on one of 277 used 2000 Chevrolet Blazers near you. the spider injector runs anywhere from $380 to $500. This can make the engine idle rough, misfire and/or stall. Welcome Enthusiast! If you already own a Chevy TrailBlazer or GMC Envoy or perhaps thinking of purchasing such a vehicle, then you have come to the best TrailBlazer and Envoy site on the net!. This case study is on a 1996 Chevrolet Blazer with a 4. It's going to be hard to really explain what my '02 5 speed blazer is doing but i'll try to do my best. 200000 Miles. i put new cam, new cdi, new carb, new fuelpump, and nothging fixed it. or its affiliates. thank you. I bought the truck recently and have begun working on it. When i tried to turn it back on, it turned but there was no response. Cold stalling problems are the most common because the engine needs a richer fuel mixture to maintain idle speed until it warms up. Then you should check all the vacuum hoses — a leaking hose can cause a too-lean mixture and a rough idle. The first sign of the problem was the service engine light would blink intermittently when driving on the highway or revving the gas. 3 and nothing but problems so far! When i start the car it almost sounds like i have a bad exhaust but i've replace the exhaust from the manifold to the tailpipe!. Just recently started rough idle and just today cut off for the first time. When I bought my K2500 6. Polaris ATV User Manual. it then would not start for two days we tried everything we could( alot of help from this forum *smiles*) then we finally found the fuel pump test wire and got it running. My M1009 seems to idle rough and the engine vibrates. Hesitation and surging on Blazer 4. If your vehicle is suffering a rough idle condition (after replacing the spider or fuel pressure regulator), take a look at the section: Spider Fuel Injector Assembly O-ring is Not Leaking Vacuum, What Next?. I replaced the O2 Sensor after the Cat, Post-cat and no change in the Voltage Reading on that sensor's Live Data. Free Same Day Store Pickup. I have a 2000 Jeep Cherokee. Cold stalling problems are the most common because the engine needs a richer fuel mixture to maintain idle speed until it warms up. i have a 99 dually 4door 4x4 7. Two screws. Service engine light flashing on my 4. Search Car Torque Specifications by Engine or Model. But it has never affected the idle like this. 5 lb/m, running rough or smooth so I don't trust the scanner. I think it may need injector replacement or maybe a knock sensor. This usually means the engine has an air leak and the PCM is trying to bring the idle speed back down by closing the idle air bypass circuit. 3 vortec vin w rough idle 1 Answer I'm still working on my 95 s10 blazer 4. Shop for an idle air control valve at your local AutoZone store or online, and benefit from our customized selection. After it warms up, as I am driving and approaching a stop, the car idles at 1100rpm. Also when i put it in drive it bogs way down and sounds like its going to die, then springs back and the truck tries to lurch forward. At engine-light-help. Thanks for any advice you can give me You have described exactly the symptoms of my blazer ,, I have cleaned the egr , the check engine light went out but it's still running rough on the idle. On a 96 blazer 4. The throttle body controls the amount of air the engine takes in, and when it gets dirty, the engine can’t idle smoothly. Find your perfect car with Edmunds expert reviews, car comparisons, and pricing tools. The 00 s10 I'm using shows 20 at hot idle and only a little more while at 2k rpm. swapped coils on 1 and 2(cleared codes first) and still idles rough but now not throwing any codes? 2006 Chevrolet Impala 3. When I erase the codes to turn off the light, for a couple of days, the scanner doesn't show anything and says everything passes. 2006-03-06 Transbec Inc. I've been trying to narrow down to what could possible be the cause. Front Wheel Hub Torque Specifications Spécifications de couple pour moyeu de roue avant Always refer to the specific vehicle manufacturer’s instruction manual for installation procedures. Don't forget about the 'big' vacuum hoses like the brake booster and PCV. It is because rough idle when warm can either be caused by one faulty component or through series of problems. I've been experiencing rough idle on the old 96 Ford Taurus OHV 3. 1994-2004 S10/S15 & Blazer 4WD 6" Rough Country Suspension Lift Kit [243. Happens more when it is cold/wet and when tank is below 1/4 full. 7l engine with tbi. When in gear, there's a "thump-thump-thump" noise, and it seems. In my neighbor's Blazer, the PCM wasn't even registering a P0300, but it was obviously running very rough (at idle that is). After it warms up, it accelerates without hesitation. i have a 96 xj6 that idles rough just sometimes especially in the morning. it was running great when I last parked it in may. Someone had rigged it up to say the least, idle set way high and other things. Assuming you know for sure that the valve isn't leaking and causing the engine to idle rough or die if whatever issue you're having changes when you disconnect the EGR then you probably have found your problem. Idle air control valves open to allow more air to "leak" into the intake, raising the engine rpms, or close when not needed. The 00 s10 I'm using shows 20 at hot idle and only a little more while at 2k rpm. For Parts, Runs and drives but runs like crap has rod knock and idles rough make me an offer have title. Learn more about Chevrolet Blazer at the Edmunds. Chevy 2003 Trail Blazer ls question = When i turn on my a/c and let it idle the rpm dips way below 1 and almost shuts off until i rev it up again but if i let it sit there it shuts off, it does the same thing when i turn on the heat, other than that the engine is fine, but only when the a/c and heat get turned on it starts to die, i just. Welcome Enthusiast! If you already own a Chevy TrailBlazer or GMC Envoy or perhaps thinking of purchasing such a vehicle, then you have come to the best TrailBlazer and Envoy site on the net!. It begins to run efficiently and the metered amount of fuel coming from the idle circuit is enough to sustain an idle. Engine Stalls (Check Engine Light May or May Not Be On). Hesitation and surging on Blazer 4. the car idles very rough. If you can only start the engine when your foot is on the accelerator, you probably have a MAP sensor problem. when i put it in park or nuetral it idle up but it still lopes. Page 24 SAFETY Operator Safety WARNING POTENTIAL HAZARD Failure to use extra caution when operating on excessively rough, slippery or loose terrain. Rough Idle. 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. Since the oxygen sensor output helps control engine timing, combustion intervals, and the air to fuel ratio, a bad sensor can disrupt these engine functions, causing a rough or irregular engine idle and other engine-related issues. 7 v8, started running with a rough knocking shaking type sound. Curing Rough Idle. Our '99 Tahoe has recently been running rough until warm.