CHEVY CHECK ENGINE

1990 Chevrolet Truck

Tiny

DannyG

April, 29, 2008 AT 2:55 PM

Engine Performance problem
1990 Chevy Truck V8 Two Wheel Drive Automatic 235000 miles

I have a 1990, 2500 series chevy truck with a 350. Check engine light came on. Next morning hard to start and runs rough when cold (Its been in the 30-40 in Chicago at night). Truck runs great after it's warm. No trouble starting the remainder of the day. We had a few warmer nights (50s) and it started much better but still not right,

Sound like a sensor to me but if you had to guess what would you try first. I hate to drop 85 bucks on a scan unless neccesary.

Thanks,

Dan

FOUND 11936 RELATED QUESTIONS

1 Answer

Tiny

rasmataz

April, 29, 2008 AT 3:24 PM

I'd try the coolant temperature sensor this is the one that gives fuel enrichment during cold starts before the oxygen sensor takes over. Then the idle air control valve.

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