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KNOCKING SOUND FROM THE ENGINE
1991 Pontiac Grand Am
April, 12, 2012 AT 9:46 PM
My 1991 Pontiac grand am has a knocking sound from the motor people say it could be the piston and someone said it could be the flywheel whats your answer?
its starts but it has a bad knocking sound cant really figure it out.
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April, 12, 2012 AT 9:57 PM
Pull spark plug wires when its nocking and see if one cylinder has more of an affect on the noise than others
April, 12, 2012 AT 10:25 PM
I dont think it has spark plug wires I no it has the 4 spark plugs on the top under the cap.
April, 12, 2012 AT 10:36 PM
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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