starts. then dies because only one injector works

Asked by George Feb 26, 2021 at 01:44 AM about the 1989 GMC Sierra 1500 C1500 Standard Cab SB

Question type: Maintenance & Repair

injectors are ok can switch wires and the other injector will
work the one not working will switch sides can low fuel
pressure cause this

3 Answers
27,570

oilyspill answered 3 years ago

If you switched fuel injector connectors and the injector in question does work. I'd check the wiring circuit for the injector in question. In the past, throttle body injection, 5.7L engine, Both injectors would pulse and spray with only 5psi fuel pressure. Fuel pressure for tbi is 9--13 psi. Even though the injectors would pulse and spray, 5 psi wouldn't start that vehicle, may not start any vehicle.

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