Rough Idle

Old 02-12-03, 02:30 PM
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Location: Baytown, TX
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Rough Idle

My 1999 Pont. Gran Am, 4 Cyl, auto has a rough idle. I have recently replaced the air filter and fuel filter since it was time and hoping that would cure the rough idle. I looked at the throttle body and there was a lot of carbon. I used a suggested cleaner and cleaned this up. Still no change.

Any suggestions for me to check out?


Old 02-12-03, 02:31 PM
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