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

1992 FORD F-150
270,000 MILES
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JHUNOLD01
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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.
Nov 18, 2011 at 5:17 PM
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HMAC300
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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.
Nov 18, 2011 at 6:53 PM
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JHUNOLD01
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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
Nov 18, 2011 at 7:28 PM
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HMAC300
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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.
Nov 18, 2011 at 8:01 PM
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JHUNOLD01
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Now if I check that and it's good/bad what should I do
Nov 18, 2011 at 8:45 PM
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HMAC300
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if it's bad then recheck your fp installation and whether the pupmp is getting power or not.
Nov 18, 2011 at 8:49 PM