Will not stay running

Tiny
TRACY HOFFMAN
  • MEMBER
  • 1993 ISUZU TROOPER
  • 3.2L
  • 6 CYL
  • 4WD
  • MANUAL
  • 170,000 MILES
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.
Wednesday, December 8th, 2021 AT 12:54 AM

1 Reply

Tiny
SQM
  • 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.
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Wednesday, December 8th, 2021 AT 7:13 AM

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