rough idle fluxuates below 1000 rpm acelerates not well will not barely go over 35 to 40 MPH

Asked by GuruTQ9CV Jul 07, 2018 at 06:08 AM about the 1999 Pontiac Bonneville 4 Dr SSE Sedan

Question type: Maintenance & Repair

1 Answer
26,245

taver91 answered 5 years ago

Could be many things. Have the engine error codes scanned and see what pops up. Symptoms sound like your cat converter is plugged or deteriorated to the point it is restricting the air flow through the engine.

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