NS-8A Checking Engine Starts and Stalls

NOTE: Perform TEST NS-7A Before Proceeding NS-7A Checking the Idle Air Control Motor


NOTE: At this point in the diagnostic test procedure, you have determined that all of the engine electrical systems are operating as designed; therefore, they are not the cause of the start and stall problem. The following additional items should be checked as possible mechanical causes of the no start condition. Any one--or more--of these items can produce a no start condition; none can be overlooked as a possible cause.


1. ENGINE VALVE TIMING - must be within specifications

2. ENGINE COMPRESSION - must be within specifications


3. ENGINE EXHAUST SYSTEM - must be free of any restrictions


4. ENGINE PCV SYSTEM - must flow freely


5. ENGINE DRIVE SPROCKETS - must be properly positioned


6. FUEL - must be free of contamination


7. ENGINE SECONDARY IGNITION CHECK - must exhibit a normal scope pattern.

TIP: Always look for any Technical Service Bulletins that may relate to this condition.