NS-7A Repairing A Start and Stall Condition

NOTE: Perform Test NS-SEL Before proceeding. NS-SEL No Start Selection Menu

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. FUEL - must be free of contamination

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

7. THROTTLE BODY - must be free of any coking conditions

8. IDLE AIR CONTROL MOTOR - passages must be free of any debris or carbon

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