Mechanics

CHEVY POSSIBLE ECM PROBLEM

1989 Chevrolet Beretta

Electrical problem
1989 Chevy Beretta 6 cyl Front Wheel Drive Automatic 120, 00 miles

i have a 1989 chevy beretta 2.8 gtu automatic and it will run and idle like a dream for about 30 mins then the idle will accelerate and sometimes stall, but it will not throw a check engine light and when hooked up to a computer all systems diagnose working properly. Please help
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Jhenry
October 18, 2009.




Have you checked fuel pump pressure? Also, have you checked for vacuum leaks? Finally, has the fuel filter been replaced in the recient past?

Let me know.
Joe



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