GRAND AM INTERMITTENT POWER LOSS

1987 All Other Makes All Other Models

Tiny

busterbeall

December, 23, 2006 AT 10:21 AM

I have a 1987 2.5 Automatic with 170,000 mi.
The problem is that the car will intermittently lose power while cruising. The check engine light will come on and the speedometer will fall to zero for a brief second and then pick right back up. I have recently changed the fuel filter but it had no effect.
No DTC is being stored in the computer either.
Once in a while the check engine light will pulsate at what appears to be engine speed --really weird.
Also, sometimes it will high idle for no reason as well.
Any help will be greatly appreciated.

Just sent a Donation as well.

FOUND 16216 RELATED QUESTIONS

1 Answer

Tiny

Jack42

December, 24, 2006 AT 7:44 AM

Sounds like an intermittent electrical problem. Start with the basics, have the alt and battery tested. Check all grounds and power feeds. Might have n main PCM relay thats giving up on you. This one might require some diagnostic equipment to find. Good luck

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