fuel injector?

1995 FORD F-150
150,000 MILES • 5.0L • V8 • 4WD • AUTOMATIC
Avatar
JOHN LEWIS4
  • MEMBER
  • 1 POST
One injector does not work. Voltage test showed same on all. But when I ran a jumper wire from positive terminal of injector beside it to positive of one that does not work it works fine.
Jun 16, 2018 at 11:43 PM
Advertisement
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good afternoon.

So you have a twelve volt feed to the injector that is not functioning?

If you do, the other side goes to the ECM for grounding. Wth the injector hooked up, you should back probe the injector connector and you should have power to both wires.

If you do and the injector does not work, it is a failed quad driver in the ECM.

If you do not, then you have an open injector and the injector needs to be replaced.

Roy

https://www.2carpros.com/articles/how-to-test-a-fuel-injector
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
May 29, 2021 at 10:54 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.