engine runs rough when running slow runs better at high speed

1997 PONTIAC GRAND AM
100,000 MILES • 2.4L • 4 CYL • FWD • AUTOMATIC
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CRAPPYCAR9
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  • 1 POST
Engine run rough at low speed smooth out and runs great at high speed
Aug 28, 2015 at 10:10 PM
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HMAC300
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  • 48,601 POSTS
scan for codes, check fuel pressure with a gauge auto parts rent it. also check vacuum leaks.
Aug 29, 2015 at 6:20 AM