Fuel system (possibly injector)

1988 CHEVROLET S-10
94,000 MILES • 2.5L • 4 CYL • 2WD • MANUAL
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HUNTERRFERGISON
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  • 10 POSTS
i have the truck listed above Iron duke 4 cylinder and i have checked the entire fuel system and fuel is flowing through it except for the fuel injector at the TBI. When i take the injector off there is a lot of fuel there but when it is on there it is not squirting fuel i have already put 2 injectors on it and they have both done the same thing. it will only run with fuel being poured into the TBI. Also on the dash the battery light and the oil pressure light are also on but this maybe do to me just swapping this engine into the truck. any help is well appreciated thanks.
Aug 23, 2021 at 12:16 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

You need to test for voltage with the key on to the injector connector to see if power is available for firing the injector.

I attached a wiring diagram for you. You need a voltmeter to be sure you have power.

Check the red wire to the injector for battery voltage when the key is in the on position.

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

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Let me know the results.

Roy
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Aug 23, 2021 at 1:03 AM
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HUNTERRFERGISON
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Okay, I will try that Roy thank you for the help.
Aug 23, 2021 at 3:53 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
You are welcome.

Keep us updated.

Roy
Aug 23, 2021 at 4:03 AM
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HUNTERRFERGISON
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  • 10 POSTS
I will.
Aug 23, 2021 at 4:15 AM
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HUNTERRFERGISON
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I got it fixed. it was just a blown fuse in the panel. thank you for your help Roy.
Aug 23, 2021 at 6:51 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
You are welcome.

Always glad to help.

Roy
Aug 23, 2021 at 7:28 AM
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