Engine Cranks But Does Not Run

DESCRIPTION
The Engine Cranks but Does Not Run diagnostic table is an organized approach to identifying a condition that causes an engine not to start. The Engine Cranks but Does Not Run diagnostic table directs the service technician to the appropriate system diagnosis.

The Engine Cranks but Does Not Run diagnostic table assumes the following:
^ The battery is completely charged. Refer to Battery Inspection/Test in Starting and Charging. Testing and Inspection
^ The engine cranking speed is within specifications. Refer to Engine Cranks Slowly in Starting and Charging. Testing and Inspection
^ There is adequate fuel in the fuel tank.

TEST DESCRIPTION

Steps 1-6:

Steps 7-12:

The number below refers to the step number on the diagnostic table.
3. While cranking the engine, the crankshaft position (CKP) activity should increment to 255, then rollover to 0.