Posts Tagged: rough idle diagnosis

Top Causes of a Rough Idle and How to Fix Them

What Causes a Rough Idle? Quick Summary If you’re searching for the causes of a rough idle, you’re not alone. A rough idle can be caused by something as simple as a dirty throttle body or as serious as a head gasket leak. In my experience diagnosing thousands of drivability complaints, the most common culprits include: • Vacuum leaks • Worn spark plugs • Clogged fuel injectors • Carbon buildup on the intake valves and carbon buildup in the throttle body • Faulty sensors • Ignition system problems • Low … Read More