changed the coil pack on my 1994 grand am 3.1 ran good after i did that but then it started to run really rough again. any possible answers
change the ignition module under it too? and how are the sparkplug wires?
no i didnt do that yet. i read to change the idle air control valve. i did that but the car still ran rough, but today the car is running normal again. cant figure this out.
intermittent means the wire connection can be better. clean contacts and maybe change sparkplug wires. one wire at a time to follow firing order. any old vacuum lines? egr ok?
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