2004 CHEVROLET TRAILBLAZER
168 MILES
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My trailblazer check engine light is on. It flashes every time i feed the car gas. Its back firing bad. Its knocking as well. Also i when i change the spark plugs oil was on the bottom of my spark plug. What in the world is wrong with my vehicle?
Feb 5, 2013 at 11:12 PM
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ASEMASTER6371
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what is the code???

the oil may be from the tube the plug is in, not in the cylinder. the valve cover gasket will resolve that.

check the coils, if they are wet, they will not work

Roy
Feb 5, 2013 at 11:23 PM