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Truck wont start after changing the rear fuel pump. Any ideas?

Tiny
JHUNOLD01
  • MEMBER
  • 1992 FORD F-150
  • 270,000 MILES
Had to change the rear fuel pump because the old was bad, so the truck was having trouble starting and staying started. Mechanics told me I had to change the pump. I changed it and truck wont start.
Friday, November 18th, 2011 AT 5:17 PM

5 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check your switching valve, it may not be switching tanks like it should. I am assuming you have two tanks. Also check your fuel pressure. Is this a gas or diesel engine in this.
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Friday, November 18th, 2011 AT 6:53 PM
Tiny
JHUNOLD01
  • MEMBER
  • 2 POSTS
Yes I have two tanks, but only the rear tank has ever worked. Its going to be gas not diesel. I'm not very car savvy I just know the basics. Where is it that I check for fuel pressure
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Friday, November 18th, 2011 AT 7:28 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Onthe fuel rail there should be a connection on it to hook up a gauge. If it'as a 4.9L it should be 50-60 and allothers except diesel35-45 psi.
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Friday, November 18th, 2011 AT 8:01 PM
Tiny
JHUNOLD01
  • MEMBER
  • 2 POSTS
Now if I check that and it's good/bad what should I do
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Friday, November 18th, 2011 AT 8:45 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If it's bad then recheck your fp installation and whether the pupmp is getting power or not.
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Friday, November 18th, 2011 AT 8:49 PM

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