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Help with 97 350 missing


sd7332
02-13-2005, 04:21 PM
I have a 97 Z71 with a vortec 350. It has just started missing. Checked the trouble codes and it said #2 cylinder misfiring. Changed spark plugs, wires, cap, rotor all with no change. It still missed. Did a compression check on #2 and had 170psi. Same with #1 cylinder. Cannot figure out my next place to check. Any suggestions? Thanks for any help.

2000CAYukon
02-13-2005, 06:09 PM
Could be the injector on #2. Also make sure fuel pressure is good. Should be around 60 PSI at idle.

Has the fuel filter been replaced recently?

//2000CAYukon

Fireplug
02-14-2005, 01:57 PM
Did you find the missing 350 ??? was it where you put it last???? lol Just yanking your chain.
Did you find any problems with cylinder 2

Chevy-SS
02-14-2005, 08:26 PM
I had same type of problem on my 350. Turns out the spark plug wires were too close together and I was getting cross-firing. Brand new wires did not fix it. I seperated the wires and all was fine. Check to make sure you got good spark at that wire and that it's not shorting out or jumping somewhere.

sd7332
02-14-2005, 08:30 PM
Haha.. ya the only thing I noticed for #2 cylinder was the spark plug didn't look like it was burning as hot as the rest of the plugs. The rest of the plugs looked like they had burned clean. #2 plug still looked like there was a little residue from the fuel on it. I checked it and it had good spark.

Fireplug
02-14-2005, 08:51 PM
Replace that plug and see if the problem clears up or stays. It might be as simple as a bad spark plug

sd7332
02-16-2005, 08:27 PM
I tried replacing all of the plugs and wires and cap and rotor. That hasn't changed it at all. Maybe it is an injector. I didn't realize that there was separate injectors for every cylinder on this model.

sd7332
03-12-2005, 04:49 PM
It turned out to be an injector. Thanks for the help.

Scott

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