Question about 1996 Pontiac Sunfire
Black smoke is from too much fuel, or a mis-firing of the spark plug. Pull all plugs to look to see if one is blackened. If so, this is your troubled cylinder. You can test each spark plug wire with a High energy spark plug tester. If that looks OK, then do a compresion test to see if the mechanical part of the engine seems good.
Posted on Oct 08, 2009
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Posted on Jan 02, 2017
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