why does my car have rough accel. rough at constant speed but runs well when applying more throtle

25

Asked by Jan 04, 2008 at 03:31 PM about the 1991 Oldsmobile Custom Cruiser

Question type: Maintenance & Repair

3 Answers

43,905

Sounds to me like either a mass airflow sensor or throttle position sensor. It's having trouble telling the ECM the "position" of the throttle or the amount of air flowing through the throttle body at idle, so it's hunting, and has a rough idle. You may also need a tune-up.

6,975

What engine do you have?

agreed with littlehorn

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