Why are the throttle body injectors continuously spraying fuel?

50

Asked by Rebekah May 20, 2022 at 08:35 PM about the 1993 GMC Sierra 1500

Question type: Maintenance & Repair

We've replaced several sensors, fuses and
gaskets as well as the distributor, but the throttle
body fuel injectors are still constantly spraying
fuel causing it to flood out. Does anyone know
why?

3 Answers

38,845

Intake leaks ? They're going to spit fuel at a determined rate from the computer , Did you replace the injectors ? Maybe they're stuck open . I wish I had the money some of you spend on parts that you don't need .

2 people found this helpful.
202,015

Injector spray is controlled by the ECU ground pulse. You might have a ground short that's causing a constant current/signal. Or, as the Vehicle Speed Sensor sends a signal to the ECU that affects pulse duration, maybe the VSS is defective. Time to turn to diagnostics instead of the check book.

2 people found this helpful.
740

Maybe you should spend money on a mechanic instead.

1 people found this helpful.

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