rough idle

Asked by Jan 24, 2017 at 02:42 PM about the 2003 Chevrolet Suburban LS 1500 4WD

Question type: Maintenance & Repair

Rough idle when in gear or park. New plugs, wires,
fuel pressure sensor. Check engine light on &
sometimes blinks.

1 Answer

76,265

Try cleaning the Mass Air Flow Sensor with electrical cleaner and also clean the throttle plate in the throttle body. May want to look at the spark plugs also.

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