Checking the Engine Mechanical System

*CHECKING THE ENGINE MECHANICAL SYSTEMS

For a complete wiring diagram refer to Diagrams/Electrical







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 Chains and Sprockets - 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 (ie. 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.

Are there any problems evident?

Yes

- Repair as necessary.
- Perform the ECM Verification Test Ver. 1. ECM Verification Test

No

- Test Complete.