1998 Chevy Silverado Check Engine Light

1998 CHEVROLET SILVERADO

81,000 MILES • V8 • 4WD • AUTOMATIC

CROUSECO

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I recently purchased a 1998 Chevy Silverado. It has been running great, except yesterday it started missing out (just a little), idling lower than normal (around 500 RPM), surging while driving and now the service engine soon light has come on. I popped the gas cap off, put it back on and the light went off. The light has since come back on & I am left wondering what is going on! The previous owner filled it with cheaper gas (85 grade) for the first time the day I bought it and I am wondering if that could have something to do with it. And ideas or suggestions?
Thanks for your help!

Dec 4, 2007 at 4:36 PM

RASMATAZ

CAR REPAIR CONTRIBUTOR
75,992 POSTS

When was the last major tune-up?

Could be multiple problems-for the idle and surging check the idle air control valve and throttle position sensor.

Gas cap-have the Evap system check

Dec 4, 2007 at 4:50 PM

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