Diagnostic Test

CHECKING THE ENGINE MECHANICAL SYSTEM 

1. Turn the ignition off.
2. Check for any of the following conditions/mechanical problems:
   • ENGINE VACUUM - must be at least 13 inches in neutral
   • INTAKE LEAKS - vacuum or coolant leaks including (Turbocharger or Supercharger on equipped vehicles)
   • 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.