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. Battery Inspection/Test
^ The engine cranking speed is within specifications. Refer to Engine Cranks Slowly. Engine Cranks Slowly
^ There is adequate fuel in the fuel tank.

TEST DESCRIPTION

Engine Cranks but Does Not Run - Steps 1-6:

Engine Cranks but Does Not Run - Steps 7-12:

The numbers below refer to the step numbers on the diagnostic table.
3. While cranking the engine, the CKP activity should increment to 255, then rollover to 0.