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.
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 misfire code on a 1998 Vortec?
Can someone please help with what I should check next, I have a 1998 Chevy K1500 5.7 Vortec with a misfire, P0300 code for 3 months. runs a little rough, while driving under normal conditions it sputters, hesitates, and also will backfire, under heavy acceleration no noticeable skip, no sputters, and does not hesitate or backfire.
What are the misfire codes for GM 4.3L?
P0303 Cylinder #3 Misfire. P0304 Cylinder #4 Misfire. P0305 Cylinder #5 Misfire. P0306 Cylinder #6 Misfire. P0307 Cylinder #7 Misfire. P0308 Cylinder #8 Misfire. Sometimes, even tho’ the engine is suffering a bona-fide misfire, no misfire codes are registered in the computer’s memory and/or no check engine light (CEL) on.
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.
Are there any misfires in the Chevy S-10?
The misfires still occured but only when the RPMs were above 800. The last test was to ohm the ignition wires. They tested out poorly. We changed them and then went for a 2 drive cycle to clear the internal codes since we needed to get the vehicle smogged. The vehicle passed with flying colors.
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.
What are the symptoms of a GM misfire code?
Whether your GM vehicle has a V6 or a V8, if one cylinder or two cut out, it won’t run on 100% engine power and this will cause some of the following consequences (symptoms): The check engine light (CEL) will be on. One or more misfire codes (P0300-P0308) will be stored in your pick up’s PCM memory. P0300 Random Cylinder Misfire.