Misfire due to carbon build up on exhaust valves on Jeep Grand Cherokee

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). This is commonly caused by carbon buildup on the valve stems, as a result the exhaust valves may close too late. All of the exhaust valves should be inspected and if necessary the engine should be decarbonized.

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Average mileage: 200,000 (200,000–200,000)
Engine affected: 4.0L 6 Cylinder
1 model year affected: 1999
2 people reported this problem
0 people shared problem details
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