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MonstrEnrgyKyle
New User
Mar 4, 2021, 7:16 PM
Post #1 of 2
(1574 views)
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I just installed a new fuel pump on my truck (its a 84 Ranger with a 1986-1993 mustang 5.0) when turning on the fuel pump the excess fuel doesn't come out of the return line but instead seems to be pushing back into the fuel pump. I am 99% sure I have the lines connected to the correct fuel input and return. I do not have the return line put into the fuel cell currently, could that be why fuel isn't being pulled through the return line?
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Hammer Time
Ultimate Carjunky
/ Moderator
Mar 4, 2021, 8:38 PM
Post #2 of 2
(1561 views)
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You're not making any sense. The fuel can't flow in opposite directions.
Have you tested the pressure at the port? Are you sure the pump is capable of high pressure?
I think that truck originally had a low pressure TBI system and the 5.0 requires high pressure.
These are the kind of issues you run into when you try to Frankenstein a vehicle.
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