One fouled plug

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Old

Nov 9, 2006 | 02:53 PM

#31

PerfDistIgnition

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Ignition

Quote:

Originally Posted by norvillebob

Folks,

I have one plug that is dry fouled black. Comp test shows 150psi. The rest look good. Timing light suggests I have spark. I've swaped plugs and wires.

Possible causes???

Cap??

Would the coil cause this?

It's the #5 plug on my 390. Misses at Idle appears to clear up at higher RPMs.

Suggestions?

thanks

bob

Usually, if the ignition system is at fault, it will not clear up at higher rpms because the more rpms you trun, the more you stress an ignition system to fire.

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Old

Nov 9, 2006 | 04:58 PM

#32

norvillebob

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Laughing Gas

Joined: Aug 2006

Posts: 815

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From: mountaintop, Pa

I agree, but I was running out of ideas? Still appears to be a faulty cap.

bob

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