Question about 1993 Pontiac Grand Prix

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Motor runs rough

Hve 1989 pontiac grand prix replaced cyl head old one was cracked. it had a problem with the motor loosing power and stoppping. let it set for 2 hours and it would start rite up and go. replaced coil packs ign module,crank sensor.now it runs worse.is the computer the problem?????????????

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Hi,there. I would suggest you do a compression test to verify that the cyl head was installed correctly.If the compression is good,i would check for codes stored in the computer and go from there.Good Luck!!!

Posted on Aug 04, 2008

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