Jeep Grand Cherokee
Report: Misfire due to carbon build up on exhaust valves
Jeep Grand Cherokee Problem
Engine Affected: 4.0L 6 Cylinder
Due to misfires, you may experience a loss of power when accelerating between 50 and 70 MPH (most noticeable below 32° F). Due to carbon buildup on the valve stems, the exhaust valves may close too late. All of the exhaust valves should be inspected and, if necessary, the engine should be decarbonized.