Mechanics

ENGINE MISSFIRES, RUNS RUFF

2003 Chevrolet Suburban • 143,130 miles

Miss fires, black smoke from tail pipe, and all the spark plugs on the passenger side look like the bottom of an old engine, full of black oil I guess. When I kick down on the excellerator the black smoke is so thick that it left black sut on the garage door. The code says random missfire. But I am confused as to why all the spark plugs on the passenger side are fouled but the drivers side are fine.
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Bquenroe
March 16, 2012.




That means it is getting too much fuel. Check fuel pressure regulator. If the check engine light is on, have the computer scanned for trouble codes.



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