Fuel pump not working and injectors not pulsing

AWESOMEBILL

MEMBER
1988 CHEVROLET S-10
2.8L
6 CYL
4WD
AUTOMATIC
250,000 MILES

Fuel pump works fine if I wire it straight to battery. Injectors have juice with test light just don't pulse. What is going on? I am on the verge of selling it for scrap and its way down. So please help me and my truck from scrap yard.

Sunday, January 19th, 2020 AT 4:24 AM

1 Reply

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

This could be a problem with your vehicle's Engine Control Unit[ECU] or a power or ground wire that goes to the ECU. n the diagrams down below I have included the fuel pump circuit wiring diagram and the engine control wiring diagram which shows the fuel injectors circuit. I have also included a diagnostic troubleshooting guide that explains how to test the fuel injector circuit to pinpoint what your vehicle's problem is from the vehicle manufacturer. You will need to use a Digital Multi-meter [DMM] to go through these guides, so here is a link below explaining how to use one, if needed:

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

Please go through these guides and get back to us with what you find out.

Thanks,
Alex
2CarPros

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