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Old 06-11-2005, 01:03 AM   #1
jacill
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Join Date: Jun 2005
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Spark plug is ugly!!

I have been having trouble with my truck running right here lately, no low end power. I pulled some of the plugs and got to #7 on my 350 and it was totaly black and had a chunky build up on it. Way to rich I'm assuming. Any ideas?
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Old 06-11-2005, 06:58 AM   #2
dwaite72lnghrn
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Sounds more like a bad valve or valve stem seal, the valves(burnt or bent) are not allowing compression to burn or the plug wire/cap is bad. I think if it was a plug wire the plug would be wet and oily but no chunks.
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Old 06-11-2005, 09:31 AM   #3
jacill
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What is the best way to check that out?
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Old 06-11-2005, 11:04 AM   #4
hgs_notes
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Two quick checks would be to do a compression test on the engine, if thats good (all relatively even pressures) then just replace the plug wire and check it later for color.

HG
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