Mechanics

SOOTY PLUGS

1993 Chevrolet Blazer • 160,000 miles

Spark plugs 1, 3 and 5 are soot colored and the engine runs rough, I replaced plugs, wires and air filter but new plugs are also sooty, dry soot, no oil, engne ran great for about 100 miles after plug change but now not running smoothly and the plugs are covered with fluffy carbon.
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Kkrokker
September 23, 2013.




What color is the soot? Do you see any smoke from the exhaust? If so, what color is the smoke?



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