I WAS GETTING A MULTIPLE MISFIRE CODE P0300

1996 Chevrolet Cheyenne

Tiny

Anonymous

December, 31, 2012 AT 12:04 AM

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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98 Leaking/burning Oil

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7 Answers

Tiny

ASEMaster6371

December, 31, 2012 AT 12:18 AM

Still 308? You only mentioned 300 first

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

Roy

Tiny

Huntwalleye

December, 31, 2012 AT 12:40 AM

After my tune up, I've only gotten a p0308

Tiny

ASEMaster6371

December, 31, 2012 AT 12:41 AM

Ok, is the plug gap correct?

Roy

Tiny

Huntwalleye

December, 31, 2012 AT 1:02 AM

Gapped to.06

Tiny

Huntwalleye

December, 31, 2012 AT 1:03 AM

I can wipe oil off the threads. Is that a sign of a leaky valve gasket?

Tiny

ASEMaster6371

December, 31, 2012 AT 1:04 AM

Most likely. Is it leaking from the valve cover>?

Roy

Tiny

Huntwalleye

December, 31, 2012 AT 1:06 AM

Honestly Roy, I'm not sure how to tell.

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