Mechanics

CHEVROLET CHEYENNE TUNE UP PROBLEM

1996 Chevrolet Cheyenne • 160,000 miles

I was getting a multiple misfire code p0300.
Did a tune up, now I'm still getting p0308 misfire on cylinder 8.
I pulled the plug, which I just replaced along with cap, rotor and wires to find oil along the threads, and looks worn. But it's only a few days old. Any ideas where to go. Also truck smells of burning oil, no visable leaks. 305 vortec


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Guest
December 31, 2012.



Still 308? You only mentioned 300 first

Start with compression test. Check for spark to the plug as well

Roy


ASEMaster6371
Dec 31, 2012.
After my tune up, I've only gotten a p0308


Tiny
Huntwalleye
Dec 31, 2012.
Ok, is the plug gap correct?

Roy


ASEMaster6371
Dec 31, 2012.
Gapped to.06


Tiny
Huntwalleye
Dec 31, 2012.
I can wipe oil off the threads. Is that a sign of a leaky valve gasket?


Tiny
Huntwalleye
Dec 31, 2012.
Most likely. Is it leaking from the valve cover>?

Roy


ASEMaster6371
Dec 31, 2012.
Honestly Roy, I'm not sure how to tell.


Tiny
Huntwalleye
Dec 31, 2012.