Will not start has good fuel pressure?

1986 FORD F-150
150,000 MILES • 5.0L • V8 • 4WD • MANUAL
Avatar
DANO5544
  • MEMBER
  • 1 POST
It will not start and it has good fuel pressure and is getting good firing. I squirt a little fuel into the throttle body and it starts. that's the only way I can get it to run. when I quit squirting the fuel in it shuts off.
May 25, 2021 at 11:44 PM
Advertisement
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

The ECM is what commands the injectors to fire and allow fuel into the cylinders. It is based on the signal from the ignition module.

It could be the ECM that is bad as well. I attached the location for you below and a wiring diagram for the injectors. Make sure you have power with the key on to the injectors. The ECM controls the ground side of the injectors.

Right Hand Instrument Panel

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

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Roy
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
May 31, 2021 at 5:47 AM
Avatar
DANO5544
  • MEMBER
  • 1 POST
Where is the PCM located?
May 31, 2021 at 5:47 AM
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
I attached the location for you in my last post. It is under the right side of the dash behind the kick panel. Remove the kick panel and release it from the bracket.

Roy
May 31, 2021 at 5:47 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.