Will not stay running

1993 ISUZU TROOPER
170,000 MILES • 3.2L • 6 CYL • 4WD • MANUAL
Avatar
TRACY HOFFMAN
  • MEMBER
  • 2 POSTS
Replaced fuel pump, and I replaced ECM, and replaced alternator, one-half tank of gas. fuel pump is running and there's pressure, but it's like fuel is not getting to the injectors, and it will only start when I spray starting fluid into the throttle body. Please tell me why it won't stay running or some idea what to look into. thank you very much.
Dec 7, 2021 at 4:54 PM
Advertisement
Avatar
SQM
  • ✓Experienced Mechanic
  • 6,383 POSTS
Hello,

This could be due to a bad fuel pressure regulator or if there is a clog in the line somewhere.
The regulator is located at the end of the fuel rail, where the fuel lines go into the rail (see diagram below).
A bad regulator can prevent fuel from getting to the injectors and create the no start issue.

Have you got a chance to actually test the fuel pressure at the rail?

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.
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.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Dec 7, 2021 at 11:13 PM
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.