Engine Mechanical System Test

Engine Mechanical System Test

For a complete wiring diagram, refer to.

Test Step 1 - Check the Engine Mechanical System

• Turn the ignition off.

Check for any of the following conditions/mechanical problems:

• Air induction system - must be free from leaks and restrictions.

• Engine vacuum - must be at least 13 inches in neutral.

• Engine valve timing - must be within specifications.

• Engine compression - must be within specifications.

• Engine exhaust system - must be free from leaks and restrictions.

• Engine oil - must be clean, at the proper level and free from contamination or fuel.

• 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.

• Fuel injector - plugged or restricted injectors; control wire not connected to the correct injector.

• Cam lobes - must not be worn excessively.

• Cylinder leakage test - must be within specifications.

• Valve springs - cannot be weak or broken.

Were any problems found?

Yes

• Repair as necessary.

• Perform the PCM Verification Test. Refer to => [ PCM Verification Test ] PCM Verification Test.

No

• Test Complete.