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Fuel injection not working properly

Tiny
MAGIC138194
  • MEMBER
  • 1988 CHEVROLET TRUCK
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 157,000 MILES
My fuel injectors spray even without the wires hooked up and the passenger side sprays a lot more than driver's side. Brand new injectors and gasket kit. This is on the truck listed above k1500 pickup with a 5.7 liter 350 with throttle body.
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Monday, March 14th, 2022 AT 4:09 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,179 POSTS
Hi,

If you are getting fuel with the injector disconnected, it sounds like you have the fuel supply reversed. As far as the injector, the ECM actuates the injector solenoid, the normally closed ball valve is lifted off its seat and pressurized fuel is injected in a conical spray pattern at the TBI. If it's disconnected, that can't be happening.

So, there is a fuel supply to the TBI and a fuel return. Confirm they aren't reversed. I attached a pic below showing what I'm referring to.

Let me know what you find.

Joe

See pic below.
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Monday, March 14th, 2022 AT 8:29 PM

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