I have a 1987 Pontiac Fiero that has been misfiring since I bought it. I have checked and replaced many things. It is NOT the spark plug wires, spark plugs, ignition coils, ignition module, crankshaft positioning sensor, MAP sensor, fuel filter, O2 sensor, injector. No vaccuum leaks, spark plugs ARE gapped correctly. What else could it be?
Compression is normal
Compression is normal