Will not start, I have spark, but no fuel pressure?

Tiny
JERRYDEAN
  • MEMBER
  • 1999 PLYMOUTH VOYAGER
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 185,000 MILES
Van won't start. I have spark, but no fuel pressure, I also can not hear the fuel pump come on. How do I know if the fuel pump is bad, or maybe something related to the ASD relay.
Thursday, February 11th, 2010 AT 8:02 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

An inoperative fuel pump can be caused by bad relay, wiring or the pump itself.
First you wan to check the relay. It is located under the hood in the main fuse box (power distribution center). See attached diagram.
Visually check the relay for corrosions or bunt pin(s). You can also test the functionality of the relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

You also want to verify that you are getting power to the relay as well as power to the pump, given the relay is good but pump not coming on. If you have power to the pump but pump not turning on then it is likely the pump.

https://www.2carpros.com/articles/how-to-check-wiring
https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.
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Friday, August 27th, 2021 AT 8:59 PM

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