Mechanics

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.
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Rich210
April 12, 2012.




Pull spark plug wires when its nocking and see if one cylinder has more of an affect on the noise than others
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Djcl
Apr 12, 2012.
I dont think it has spark plug wires I no it has the 4 spark plugs on the top under the cap.


Tiny
Rich210
Apr 12, 2012.
You can run the engine with spark plug wires jumped from the cover with the coils to the plugs. Disable one @ a time


Djcl
Apr 12, 2012.

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