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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.
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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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