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Q: My engine is misfiring at all speeds and check eng. light on, sometimes flashes. on 2002 Chevrolet Prizm

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Check engine light has been on for long time and eng. ran O.K.
Now when eng. is turned on it misfires at idle. It also misfires when I give it a lot of gas. What is the first part
that should be checked?
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plugs and wires. it sounds like you have neglected the service on this car if the light has been on for that long. i would go to a shop and get a real diag and a bid to put in good working order before something big goes wrong.

Roy
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