Circuit/System Description

This Engine Cranks but Does Not Run is an organized approach to identify a condition which causes the engine to crank but not start. This diagnostic directs the technician to the appropriate system diagnosis.

This diagnostic assumes the system voltage levels are adequate for starter motor operation. Refer to Battery Inspection/Test (Top Post Terminal Battery) or Battery Inspection/Test (Side Terminal Battery) and Engine Cranks Slowly . Fuel level and fuel quality should be determined for correct diagnosis.