fuel pump won't prime

Asked by Apr 24, 2016 at 10:18 PM about the 1990 Ford Mustang GT Convertible

Question type: Maintenance & Repair

in the mornings or after a period of time
when I turn the key to the on position fuel
pump will not prime unless key is left in on
position for 5-25 minutes. when car has sat
in a parking lot of in the sun the fuel pump
will usually prime either right away or after
just a minute. & sometimes before it will
prime if I turn key off then back on I will
hear a knocking noise from the fuel pump
but until it will eventually prime itself.

2 Answers

25,525

first change the fuel filter ...or is it OK??????

5

when there is a low fuel or no fuel ,fuel pressure gauge is first step ,fuel filter , fuel pressure regulator etc.

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