I have replaced fuel pump, spark plugs and wires to no avail, exhaust smells bad
Jan 26, 2010 at 9:14 AM
1998 Chevy Blazer random missfire
1998 CHEVROLET BLAZER
JOHN GILLENTINE
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Randome misfire normally indicates a vacuum leak and bad fuel
Misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
Misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
Jan 26, 2010 at 9:19 AM
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