Crown Vic fuel pump issue.

Asked by Trytar Sep 19, 2016 at 04:17 AM about the 1985 Ford LTD Crown Victoria 4 Dr Sedan

Question type: Maintenance & Repair

For the past couple of months my Vic's fuel pump
has been making a constant loud buzzing sound.
Meanwhile, the car will NOT start up without me
giving it some gas and even after it's started I have
to keep tapping the pedal for a minute or two or it
will die. I'm guessing it has something to do with
the fuel pressure but I'm obviously no expert, as
this is my first car.

4,340

Up answered 7 years ago

I would check fuel pressure. And another thing to look at is the idle air control valve as well

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goodolboydws answered 5 years ago

Its possible that either the in-line fuel filter or the in-tank fuel screen is clogged (or both, such as from a huge load of rust/crud in the fuel tank) to the point that there is not enough pump pressure to force sufficient fuel through both of these filters for all starting/driving conditions.. IF that's what's happening, th eincreased back pressure on the fuel pump may very well be what's making the noise more noticible. One tipoff that its a clogged filter is that generally when the engine dies it wwill easily restart after a minute or 2 as during the down time the already presurized fuel has time to work its way through even a mostly clogged filter. Another tip its a clogged filter is if teh engine runds fine undera light load (idling or driving slowly) but dies or bogs down when rapid accelleration is required. Another possibility is that the fuel pressure REGULATOR has failed in such a way that it is now requiring increased pressure from the pump to force fuel that THAT.

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