Why did my Chevy S-10 misfire in the morning?

My morning misfire was caused by a bad intake manifold gasket (a very common problem with most gm models around 2000 model year. Caused by crappy dexcool coolant ). After sitting overnight a small amount of coolant would get into right rear cylinder. It would miss for a bit and then run fine. Doesn’t have to be leaking a lot either.

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 Chevy S10 have a misfiring gasket?

“The dreaded mystery coldstart misfire.” I like many others had the shudder between 1500-1800 rpms until the engine came up to operating temperature. I just found the root of all evil hiding under the EGR valve. Removed EGR to clean and realized there was a blow by in the gasket.

Why is the coil going out on my Chevy S-10?

If the coil is going out, the more you require from it, the more the engine will miss. It would create the code given. That would be my best educated guess from the information you gave. 36 people found this helpful. Just as a possibility I may also suggest trying a MAF cleanner, it should be about $8 a can.

Is the Chevy S10 extreme 4.3 W misfiring?

11 people found this helpful. my 99 s10 extreme 4.3 W missed at the idle driving speed range for years got worse when it was damp outside.stomp down on the gas and fine.it also started and idled well it was just the normal driving range.

Where is the blow by Valve on a Chevy S-10?

Removed EGR to clean and realized there was a blow by in the gasket. Removed gasket and noticed it was on the topside and underside of the gasket. Scraped the remainder off, cleaned the surface, and installed new gasket with original EGR valve.

How to fix a blown gasket on a Chevy S-10?

What was the misfiring code on my 1999 Chevy S-10?

First we replaced the plugs that were the wrong ones. With the computer conected we monitored the live data and were recordeing most of the misfires in cylinder 6, 4, 2 with an occational misfire on 5. We had no codes recorded in the ECM but the fuel trims were way off.

Is the EGR gasket on a 99 Blazer?

I have a 99 s10 blazer that is doing the same thing. idels great but misses bad when taking of even when your going about 65mph it wil wanna miss and jump. punch it down and runs great. and cheap fixes possible? Id sure appreciate any info 42 people found this helpful. Have you checked your EGR gasket? I would start there.

What to do if your Chevy truck misfires?

The truck will start and idle fine however as soon as you feed a little gas it starts to miss. Giving it even more gas is either covering up the misfire or it is clearing and seeems to run better. I’ve just replaced cap/rotor wires and plugs.

What was the problem with my Chevy Blazer?

So far have replaced: fuel injection system, throttle body sensor, fuel filter, spark plugs, wires, distributor cap, rotor and EGR valve. Fuel pump does whir and kick in when key turned. Previous to not getting fuel completely, the Blazer was surging when I drove it and was not responsive to the gas pedal intermittently.

What’s the problem with my Chevy Blazer fuel pump?

Fuel pump does whir and kick in when key turned. Previous to not getting fuel completely, the Blazer was surging when I drove it and was not responsive to the gas pedal intermittently. Local parts store suggests IAC valve?

What was the fuel gauge on my Chevy Blazer?

Stopped at a light about 1 1/2 miles from church. When green, gave it normal gas. Very poor acceleration. Fuel gauge reads just under 1/4 tank. I then let off the accelerator and then pressed it ever so slightly. I did accelerate, but obviously not very fast. About 30 seconds or so later, we were fine.

What causes a bad gas gauge on a Chevy truck?

A poor ground or loose connection to a gas gauge is just as likely to cause problems as loose or dirty battery cables assuredly will with your starting system.

When did the Chevy S-10 Blazer stop being made?

Chevy S-10 Blazer: Produced between 1982 and 2005, the Chevrolet S-10 Blazer offered two generations of compact and mid-sized sports utility vehicles. The former ended in 1994, replaced by a larger mid-sized 1995 body style.

How to know if your Chevy Blazer has a misfire?

1 The P0300 Chevy trouble code will trigger the Blazer’s service engine soon light. 2 The vehicle itself may begin to run rough. It depends on how serious the misfire is. 3 The vehicle may produce excess vibration, especially at lower RPM conditions