Q: Q: Rough idle

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rough idle

My car has 192000 miles.
My car has an automatic transmission.

Hi There, A rough idle may be caused by many different things such as low fuel pressure, low voltage to the fuel injectors, dirty fuel injectors, a vacuum leak, a faulty Oxygen sensor or a dirty or failing idle air control valve. Any of these possibilities relate to fuel delivery issues that will disrupt the normally balanced air/fuel mixture that would otherwise allow the motor to run smoothly. I would recommend having an expert from YourMechanic come to your location to diagnose your rough idle problem.

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