Why does my Chevy S-10 idle so bad?

Computer does show that it is in OPEN LOOP MODE and O2 Sensor shows RICH and while working the throttle and watching the code meter, the reading will move from RICH to LEAN and back to RICH again. While all of this has helped the engine somewhat, it still barely idles and it still lops really bad.

What’s the problem with my Chevy S10 4.3?

I have this same problem with my 99 s10 4.3. the code reader says miss fire cylinder #2… so I replaced wires, plugs, distributer cap and rotor. after 2 days this problem got worse. again I read the codes and it read the same code, cylinder #2. good old GM I guess 71 people found this helpful.

Why does my car idle but no power?

Installed new fuel pump and it ran great for 2 months then it just lost power during ride home from work. Replaced fuel pump again with no results. Replaced both ignition coil packs and fuel filter, still no results. TPS is working fine. Not sure about fuel pressure regulator-and there is no port to check fuel pressure.

What’s the fuel pressure on a Chevy’s 10?

I checked the fuel pressure and it is reading 11psi down to about 7psi. The pressure moves down and back up slowly as you race the engine and basically is pretty stable most of the time around 9-10psi.

Why is my Chevy 4.3 engine still running?

Checking your vehicle’s fluid levels is always a good idea to maintain the overall longevity of the engine. Once you have ruled out all the basics, you can go back to what the Chevy 4.3 engine is known for: bad idle air control valves and throttle control switches.

What causes hesitation and surging on Blazer 4.3L?

Fix Hesitation and surging on Blazer 4.3L If you have Hesitation and surging on Blazer 4.3L and it’s driving like a dog—poor acceleration, hesitation, or a surge and you suspect a fuel problem, you may be partially right.

Where is the idle control valve on a Chevy Vortec?

The idle control valve sits on the throttle body and is responsible for adjusting the amount of air that enters the engine at idle, ultimately controlling engine idle speeds. At idle, the valve blocks a small amount of air from entering the engine, keeping idle RPM’s low.

What are the symptoms of a bad Vortec Spider injector?

Symptoms of Bad Vortec Spider Injectors 1 Misfire engine codes (P0400-P0406 and P0300 codes) 2 Long starting, hard cranking 3 Poor idle and running at low-rpm’s, but fine at high rpm’s

Why does my son’s 95 Chevy S-10 quit running?

My son’s has a 95 S-10. Was running great, until one day a couple of months ago, it started running really rough at a red light ( as he tells me ) and he had to work the throttle to keep it running and then about a block or two later it quit and hardly would start. When it does, it will not stay running well even with throttle work.

Symptoms of Bad Vortec Spider Injectors 1 Misfire engine codes (P0400-P0406 and P0300 codes) 2 Long starting, hard cranking 3 Poor idle and running at low-rpm’s, but fine at high rpm’s

What are the symptoms of a failing Vortec distributor?

Symptoms of Failing Vortec Distributor 1 Engine misfires 2 P0300 to P0306 engine codes (for misfire) 3 Engine is slow to start, or not starting 4 Poor idling, acceleration, etc. (usually caused by misfires)

Why does my Chevy S-10 not Rev past 3000?

Egr and PCV won’t prevent engine rpms from increasing. Its either as Tenspeed said, computer controlled rev limiter or a common one is a clogged exhaust, the most common under that category is backed into a curb and bent something or clogged cat.

What’s the rev limit on a Chevy S-10?

Modern engines can only rev to 3000-4000 in neutral or park so they don’t blow up. I don’t know how to check it or fix it but get the codes read to see if anything turns up. 3 people found this helpful. Roy bean have you been hitting the bottle again. Egr and PCV won’t prevent engine rpms from increasing.

Why does my Chevy S-10 not Rev past 3000 rpm?

Btw its a post 2000 GM so the egr is elecrltronic not vacuum operated, and his issue is the vehicle won’t to past 3000 rpm, NOT it’s decelerating funny. Read the issue before you pull an answer out of that hat.

Why does my Chevy S10 keep stalling?

One of the most common issues your Chevy S10 is likely to develop is a stalling problem. The most challenging part of diagnosing a stalling problem is reproducing the conditions that led to the stall in the first place. Stalls can happen at any time, and it can be incredibly jarring when it does happen.

What kind of injector does a Sonoma 88 S10 use?

Compnine also lists the 92 sonoma with a fuel injector as a ACDelco #217-338. On the 88 s10 the fuel injector is a ACDelco #217-336. Thanks for the help. The Throttle bodies look the same, the injectors may have some internal difference, perhaps the 92 has higher fuel pressure, the 88 only has 9 to 13 lb fuel pressure.

What kind of fuel spray does a 1988 S10 use?

1988 S10 2.5 TBI, 5 speed. No fuel spray from injector. Got this for my step son who is 1st year electrician apprentice. The vehicle is old and worn, but didn’t burn oil. Before it died there was an issue with chugging, it would shake and buck and rattle the whole drivetrain real bad.

Why does my Chevy S10 stall at idle?

Pulling over and letting it sit for 10 15 minutes sometimes fixes the issue long enough for me to get home. Sometimes the problem happens again after 5-10 more minutes of driving. Truck otherwise runs great at idle, is not hard to start, doesn’t seem to use excessive fuel.

Why does my Chevy S-10 not start up?

Once the truck starts and is running you can remove the jumper to the fuel pump and it will continue to run. The only thing i can think of is that you are not getting the priming signal to the fuel pump, that the ECM if faulty. It turns over fine.

Why does my 1994 Chevy S-10 not start?

1994 Chevrolet S-10 4.3 tbi. I never get the signal to turn on the fuel pump or fire the injectors but if i poor gas in the intake once the truck starts it runs fine. Any ideas ? I have replaced the fuel pump relay oil pressure switch and computer.

What’s the throttle aceleration on a Chevy’s 10?

Throttle aceleration is smoother ( not a clean smooth note by any stretch ) when going up with NO backfires up or coming back down, but the engine still hunts, misses and lops. There are only a few things that I think that I might have missed, other than my brain, and I might not be able to find it either.

How is my 1994 S-10 4.3 running?

Starts fine, even today when it was -15, fuel pressure 52 running, holds after shut down, newer plugs/wires/cap rotor, tested MAP sensor and tests good, tested resistance changes in TPS (with sensor out) and changes were smooth along range, unplugged every sensor I could find individually looking for changes, no luck.

How often does a 94 S-10 4.3 drop rpm?

After you take it out and drive it, it’ll idle fine for a couple minutes, then will drop a couple hundred rpms every 30 seconds or so for just a count, then back to normal. Any ideas? I’m pulling my hair out.

What causes a misfire on a 94 S-10?

Typically if the lower intake gasket leaks vacuum, it only affects one cylinder and causes a noticeable misfire all the time. On your engine, the ECM batch fires the injectors, it can not richen the mixture for individual cylinders.

Are there any problems with the Chevy 4.3 Vortec engine?

The 4.3 Vortec engines made from 1996-2002 (L35 and LF6) have been reported to have engine knock problems. In a properly functioning engine, fuel burns in even pockets instead of all at once. The pockets burn in even timing, in sync with engine cycles. Engine knock occurs when the fuel burns unevenly and out of sync with the engine cycles.

What causes a car to idle rough at idle?

A clogged fuel filter stops the engine from receiving the right amount of fuel causing the engine to be rough idle. Fuel filters are often pretty cheap, and you can easily get the fuel filter removed and replaced from a nearby mechanic or do it yourself if you have some knowledge. 6. Dirty Air Filter

What are the symptoms of a bad distributor rotor and cap?

Symptoms of a Bad or Failing Distributor Rotor and Cap Common signs include engine misfires, car not starting, the Check Engine Light coming on, and excessive or unusual engine noises. by Valerie Johnston on January 07, 2016 Vehicle Engine Mechanical Inspection Cost

What causes a Chevy S10 engine to idle rough?

If an oxygen sensor goes bad, it can make your S10 run too lean (or rich). A super lean running engine will often idle rough. The fuel injection systems job is to atomize the fuel into fine mist.

What is the idle speed of a 95 Chevy S-10?

I ran compression tests and all cylinders except #5 read around 105 – 110. Number 5 reads 95 +- 5. All plugs are new with only about 5 mins on them. When I pulled them to do the compression test they all are lightly coated with black soot. RICH, RICH, RICH.

Why does my Chevy Cobalt have rough idle?

An internal combustion engine needs air, fuel, and spark in order to achieve ignition. When one or more of these variables is off it can lead to a rough idling condition. Most of the time the culprit is going to be the ignition system, although there are a myriad of other causes.

What do you remove from a Chevy S-10?

All the way at the front of the truck, we needed to remove more of the factory S-10 mounts. The factory S-10 bumper mounts and radiator support mounts needed to go. A 4.5-inch cut-off wheel on a die grinder was used to remove these two items.

Is the Chevy S-10 a good chassis swap?

This 1986 standard cab long-bed S-10 was the perfect candidate for our chassis swap. We picked it up for $450 and it was still running and driving. It did have a blown head gasket, but that didn’t stop us from attempting to completely blow up the engine with a nice burnout.

Where is the transmission cross member on a Chevy S-10?

The piece is held against the side of the frame rail and three bolts secure it to the frame through factory S-10 frame holes. Next up, we set the transmission cross member mounts in place and loosely bolted up the forward two bolts.

Where can I find a used Chevy S-10 s?

Find used Chevrolet S-10 s near you by entering your zip code and seeing the best matches in your area.

Are there any manuals for the Chevy S-10?

Every Manual available online – found by our community and shared for FREE. Enjoy! The Chevrolet S-10 is a compact pickup truck from the Chevrolet marque of General Motors. It was the first compact pickup of the big three American automakers.

When was the last time I serviced my Chevy’s 10?

1st owner drove an estimated 6,482 miles/year • 2nd owner drove an estimated 13,277 miles/year • 3rd owner drove an estimated 4,531 miles/year • 4th owner drove an estimated 0 miles/year. Last serviced at 114,492 miles in Joliet, IL on 11/29/16 • Vehicle serviced • Maintenance inspection completed.

Is there a Chevy S-10 Blazer or S 15 Jimmy?

There was also an SUV version, the Chevrolet S-10 Blazer/GMC S-15 Jimmy. An electric version was leased as a fleet vehicle in 1997 and 1998. Together, these pickups are often referred to as the S-series. Get notified for new files?

Can a bad throttle position sensor cause idle surging?

Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. 3) Check Engine Light

What causes a Chevy 4.3 engine to stall?

Lack of oil will cause a knocking sound in the engine, stalling, poor acceleration and eventually engine break down. Lack of transmission fluid, battery fluids, radiator and cooling system fluids can all cause symptoms that mimic bad idle air control valves and throttle control switches.

What kind of noise does a Chevy 4.3 make?

by Contributor. A common complaint with the Chevy 4.3 engine is that it doesn’t idle well, it’s loud and makes awkward noises. Examples of this are staling, lurching and poor acceleration. Poor idling and loud engines usually go hand-in-hand.

Why does my GM V8 engine misfire when cold?

Because, GM V8 engines are very prone to a rough idle and engine misfire when cold. The check engine light may also come on, with codes P0300, P0171 and PO174. But, as the engine warms up, the engine misfire or rough idle tends to go away; which seems confusing.

Is there an engine misfire code on a GM 4.8L?

Engine Misfire or Rough Engine Idle on GM 4.8L, 5.3L, 6.0L is becoming; more common and getting harder to diagnose. Because, GM V8 engines are very prone to a rough idle and engine misfire when cold. The check engine light may also come on, with codes P0300, P0171 and PO174.

What are the symptoms of a bad idle air control valve?

Below are the top 5 symptoms of a bad idle air control valve which you will easily notice. Since the idle air control valve is supposed to manage the idle speed of the engine, a bad valve will certainly throw that out of whack. It will cause the idle speed to randomly fluctuate to different speeds rather than stay at one constant speed.

Why does my Chevy Blazer have a rough idle?

What are common reasons my Chevrolet Blazer has a rough idle? 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. See what others are asking about their Chevrolet Blazer.

Why is my Blazer 4.3L driving like a dog?

If you have Hesitation and surging on Blazer 4.3L and it’s driving like a dog—poor acceleration, hesitation, or a surge and you suspect a fuel problem, you may be partially right. But before you start replacing really expensive components like the fuel pump, try this: Disconnect the electrical connector to the MAF sensor and take it for a drive.

Why does my 1998 S10 V6 stall out?

Sometimes after sitting overnight my 1998 s10 v6 4×4 manual transmission, will start up and in a split second lower the idle to almost nothing… sometimes it will stall out. It will start after 3 or four times after doing this.

Why does my GMC S15 die at high idle?

Recently my truck has began to die when coming back down to idle. In looking at the fuel injection, I can see the injectors stop injecting fuel. After it dies, it is very hard to restart unless it is left alone and cools a bit. If the IAC is unplugged, the engine will run at high idle fine.

How to check the power of a S10 Blazer?

An expert that got 5 achievements. An expert whose answer got voted for 100 times. Check your coil output, buy a cheep spark tester. Pull of a spark plug wire and plug in the tester (ground the other end), set it to bridge a gap for 30,000 volts.Have someone start it and make sure the spark will jump the gap on the tester.Danger-Very high voltage!

What kind of spark does a S10 Blazer have?

It will light you up if your touching the tester while the car is running!You’ll be able to see a bright blue spark (and hear it as well) if your coil is good.If it’s a yellow thin spark it’s probably the coil. If you have good spark, check the fuel filter and fuel pressure at the fuel rail.

What are the symptoms of a Chevy Vortec engine problem?

Symptoms of Failing Idle Control Valve and Throttle Position Sensor 1 Rough idling 2 Engine stalling 3 Hesitation during acceleration 4 Hard shifting and lack of power 5 Lack of accelerator responsiveness 6 P0122 engine code (TPS sensor)

What causes engine knock on a 4.3L Vortec?

Engine knock can be caused by a ton of factors, such as low-grade fuel, bad spark plugs, carbon build-up, etc. Engine knock is terrible for your engines internals and can cause serious damage to the pistons and to the cylinder walls. On the 4.3L vortec, the cause of the engine knock has not necessarily been figured out, still to this day.

Why is my Chevy Silverado running rough at idle?

Really, your Silverado will be running rougher at any RPM, but a misfire will be most pronounced at idle. Spark Plug Wires – While not every model and engine combination of vehicles today comes with spark plug wires (a lot are now coil on plug), if your Silverado happens to have them, they can go bad and cause a rough idle.

Why is my Chevy Vortec 4300 V6 leaking fuel?

In the L35 and LF6 engines, the spider injectors are known to leak at the pressure regulator and at the supply and return lines due to a design fault. Outside of leaking fuel onto the exterior of the engine itself, it can cause excess fuel to get sucked into the engine.

Why is my idle air control not working?

My Idle Air Control also responds accordingly by low counts when it runs good for 3 second and opens up when the engine is starting to stall and trying to keep it running . It dies anyway. I have new gasket on the base of the TBI assembly.

Why is my GMC TBI not running at idle?

It is no fun to get to the plug on these models, let alone screw in a compression tester. The injector pulse is not much and basically there is a straight down spray out of the injectors and no cone pattern when it runs for 2 seconds total or so. Sometimes it will try to run for 7 or eight seconds, rpms going up and down till it stalls out.

Why does my Chevy Silverado idle and stall when stopping?

I had a trouble code of # 22 t.p.s, I replaced the throttle position sensor, m.a.p sensor, and the idle air control sensor,however i am still having the problem, it is throttle body injected, and there arent any other codes showing up. Any help would be much appreciated. Hello Clay.

What causes an Audi A4 to idle rough?

A super lean running engine will often idle rough. The fuel injection systems job is to atomize the fuel into fine mist. If a fuel injector has an issue with this process, it will either let too much or too little fuel into the combustion chamber relative to the amount of air.

Why is my GMC Sierra 1500 stalling and dying?

There is no code given. Have changed the injectors, timing, fuel tank, fuel pump, fuel pump, map sensor, cooling temp sensor on front of block, rebuilt the tbi, air idea valve. None of this hasite helped. The truck starts and dies. Have to give a little gas to keep running. While driving have to 2 foot it so it won’t die.

What’s the idle speed on a 1990 Chevy?

Not open for further replies. I bought a 1990 Chevy 1500 pickup several months back. it idles around 1500 to 1800 rpm and it is tearing the transmission apart.

Why is the idle on my air conditioner so low?

If the idle is low and inconsistent, it may be due to an issue with your idle control valve. Low idles could also be caused by vacuum leaks. 3 Look for signs of a vacuum leak.

How to solve the extream high idle problem?

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. yet i still have an extream high idle problem, any sujestions, thanks in advanced Jim S… Two things come to mind very quickly. 1.

What kind of engine does a 1992 GM S-10 have?

The lower steering column cover would need to come off to the access the switch. 1992 S-10 Pickup V6 4.3 4WD Vortec V6. GM Computer codes = no Got new battery installed. Truck ran fine never had problem until now truck cranks fine and strong also fuel pump starts for 2-3 seconds then turns off left for 2 days came back would not start.

What kind of engine does a Chevy Blazer have?

1996 Chevy Blazer. 6 cylinder engine. While driving on the highway my Chevrolet Blazers engine just shut off. I pull over, wait a minute, then start the engine and continue down the highway again. A minute later the engine shuts off again. This happens 7 or 8 times.

How can I tell if my Blazer cylinder is dead?

If the cylinder is NOT ‘dead’, then this will have a negative effect on engine idle since it will get worse. Repeat this test on the remaining 4 spark plug wires (testing 2 at a time). The result? The result of the cylinder balance test was that cylinder #1, on my neighbor’s Blazer, was dead!

Why does my Chevy S-10 idle so bad?