Problem Reports

The throttle position sensor (TPS) may fail causing intermittent drivability problems like hard starting, stalling, and/or hesitation when accelerating. A failed TPS will require replacement, proper diagnoses should always be performed before replacing any parts.

Due to warped front brake rotors or variations in the thickness of the rotors, brake pulsations may develop. The best method to reduce pulsations is to use an "On the Car" brake lathe (as long as the rotors are suitable for turning). "On the Car" equipment can correct variations (or "runout") in the rotor surfaces because it also corrects variations in other components (e.g. the hub).

The throttle body may accumulate an oily, black residue in the bore and on the throttle plate causing hard starting or possibly stalling when coming to a stop. The throttle body should be cleaned during regular maintenance but do not spray cleaners directly on or at the throttle position sensor (TPS) as this can damage the sensor.

Ignition wire failures can cause a rough idle or intermittent engine misfire and there might not be a Check Engine light.

If the clutch is slipping when the clutch disc is 2/3 worn or if the clutch slave cylinder dust boot is torn, there may be insufficient clearance between the clutch slave cylinder and the clutch housing. A 5mm shim is available from Jeep that is installed between the slave cylinder and the clutch housing.

2.5L 4 cylinder
If the power steering pump pulley is not installed in the correct position on the pump shaft, the drive belt may make a chirping noise and sound as though it is coming from another component.