MY HAS A KNOCKING SOUND FROM THE MOTOR PEOOPLE SAY IT COULD BE THE PISTON AND SOMEONE SAYED IT COULD BE THE FLYWHEEL WHATS YOUR ANSER?
1991 Pontiac Grand Am
Its starts but it has a bad knocking sound cant really figure it out..
Pull spark plug wires when its nocking and see if one cylinder has more of an affect on the noise than others
I dont think it has spark plug wires i no it has the 4 spark plugs on the top under the cap.
You can run the engine with spark plug wires jumped from the cover with the coils to the plugs. Disable one @ a time
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