My 91 Firebird 5.0 TBI was running great, then died suddenly. SES light on occasionally - code 22 (Throttle Position Sensor low voltage) for a few weeks with occasional erratic idling. Now, will crank, but injectors don't fire, and engine won't fire at all with gasoline poured in. All fuses good. Replaced ECM - no change. Fuel pressure fine. Suspect spark control module - but would that shut down injectors, too?

Seeking guidance.
SL

 

Check the distributor. The ECM needs the ignition signal to fire the fuel injectors.