1968 Shelby GT500

TroubleShooting EFI Problems

This check list will help diagnose a problem, I would recommend doing them in this order:

* Trouble codes
* Base timing
* Fuel pressure
* Vacuum leaks
* Fuel injector stuck open or leaking
* Don’t re-wire the injector harness
* Cylinder compression tests
* Plug wire routing
* Spark plug gap

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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