Diagnostic Test

CHECKING THE ENGINE MECHANICAL SYSTEM 

1. Turn the ignition off.
2. Check for any of the following conditions/mechanical problems:
3. 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.