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No power to fuel injectors

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I blew up the diagrams for you so you can see better.

Roy
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Tuesday, October 29th, 2019 AT 4:39 PM
Tiny
DIRTY_95
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  • 12 POSTS
Yes, I have 12 volts to fuel pump and no voltage at a4 where EGR comes from computer.
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Saturday, November 2nd, 2019 AT 12:07 PM
Tiny
ASEMASTER6371
  • MECHANIC
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That should be 5 volts and comes from the ECM.

Can you check the map sensor gray wire and see if that has power?

Roy
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Saturday, November 2nd, 2019 AT 12:23 PM
Tiny
DIRTY_95
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Yes 5 volts on grey wire on map sensor.
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Saturday, November 2nd, 2019 AT 12:31 PM
Tiny
AL514
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Are you getting a pulse with your test light on the purple/white wire at the distributor while cranking? It's the reference high signal to the ECM. Needed for injector pulse.
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Saturday, November 2nd, 2019 AT 12:31 PM
Tiny
ASEMASTER6371
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You have a wiring issue. The gray wire at the map sensor is the same wire. There is an issue in the harness where they come together. I would check the harness carefully for any damage. You may have a break inside the harness.

https://www.2carpros.com/articles/how-to-check-wiring

Roy
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Saturday, November 2nd, 2019 AT 12:33 PM

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