Low fuel pressure on cold start

Tiny
ANONYMOUS
  • MEMBER
  • 2007 FORD FOCUS
  • 60,000 MILES
What is the most common problem when the vehicle has weak fuel pressure?
Wednesday, December 5th, 2012 AT 5:52 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

Weak/low fuel pressure can be due to a restriction in the fuel line, it could be a bad fuel pressure regulator, clogged fuel pump. It can also be a weak fuel pump that is unable to provide enough fuel.
If you are only experiencing low fuel pressure on cold start it could be a bad regulator.
What pressure reading are you getting when cold?

With the key on and engine off this vehicle should have 35-70 PSI of fuel pressure.

Here is a guide on how to test the fuel pressure:

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

I have attached the fuel system diagram for your reference.

Please let me know of any questions.
Thank you.
Was this
answer
helpful?
Yes
No
+1
Wednesday, October 13th, 2021 AT 10:10 AM

Please login or register to post a reply.

Sponsored links