Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Patriot and 2017 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

CHECKING THE ENGINE MECHANICAL SYSTEM

Turn the ignition off.
Check for any of the following conditions/mechanical problems:
- ENGINE VACUUM - must be at least 13 inches in neutral
- INTAKE LEAKS- vacuum or coolant, including the Supercharger and Low Temperature Radiator system.
- ENGINE VALVE TIMING - must be within specifications
- ENGINE COMPRESSION - must be within specifications
- CYLINDER LEAKAGE TEST - must be within specifications
- ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks
- ENGINE PCV SYSTEM - must flow freely
- TORQUE CONVERTER STALL SPEED - must be within specifications
- POWER BRAKE BOOSTER - no internal vacuum leaks
- FUEL - must be free of contamination
- VALVE SPRINGS - cannot be weak or broken
- CAM LOBES - must not be worn excessively
- CAM SHAFTS - must not be worn or have excessive end play
Are there any engine mechanical problems?

Yes
- Repair as necessary in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Test Complete.