Checking the Engine Mechanical Systems

CHECKING THE ENGINE MECHANICAL SYSTEMS

POSSIBLE CAUSES
- Engine mechanical systems

DIAGNOSTIC TEST

1. CHECKING ENGINE MECHANICAL

NOTE: The following items should be checked as a possible cause of a Driveability or No-Start problem.

WARNING: DO NOT ATTEMPT TO REMOVE OR SEPARATE HIGH PRESSURE FUEL LINE. ATTEMPTING TO DO SO COULD RESULT IN SEVERE BODILY INJURY OR DEATH.

Engine Valve Timing - must be within specification
Engine Compression - must be within specifications
Camshaft Lobes - check for abnormal wear
Camshaft Position Sensor - check the camshaft position sensor tooth for debris and deterioration
Crankshaft Position Sensor - check the crankshaft tone wheel for debris and deterioration
Engine Exhaust System - must be free of any restriction
Engine Drive Sprocket - must be properly positioned
Vacuum System - must operate properly and be free of any vacuum leaks
Fuel - must have adequate supply and must be free of contamination (i.e.. debris, water and gasoline)
Fuel Injectors - must not be plugged or restricted
Fuel Lift Pump - must operate properly (where applicable)
Fuel Injection Pump - must be producing the correct output volume and pressure
Inspect the Fuel Lines, Fuel Filter and Fuel Pressure Relief Valve for signs of restriction and leaks

NOTE: Check for any Technical Service Bulletins that may relate to the problem.

Q: Are there any problems evident?

YES: Repair as necessary.
Perform the ECM Verification Test Ver. 1. ECM Verification Test
NO: Test Complete.