Question about 1993 Ford F250

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Both pumps are out on my f250 would like to know if possible to put high pressure pump in frame or if would have to take tank pumps out of the tanks to work or have you ever tryed this?

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NEED TO REPLACE ONES IN TANK IF GO OTHER WAY JUST GOING CAUSE PROBLEMS FOR U ..

Posted on Dec 29, 2010

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I have a 1989 ford f 250 302 efi im having a fuelissue i have found what i thought to be a fuelpump it comes on and everything with the key it is on the fuel rail toward the front of the truck but everyone...


Up until 1989, EFI fuel systems in the F250 actually used two fuel pumps; a low-pressure pump in the tank and a high-pressure pump mounted on the frame.seddy29732_7.jpgHigh Pressure Pump


The part on the fuel rail you are referring to is most likely the fuel pressure regulator, which, if bad can also cause fuel delivery problems. From 1990 and up, the two pump system was replaced with a single, in-tank pump.seddy29732_9.jpgHope this info helps you out!

Jun 03, 2011 | 1989 Ford F 250

1 Answer

Steps replacing a 1985 grand marquis fuel pump for first time alone thanks


See Figure 1
Two different electric fuel pump configurations were used on fuel injected models. One consists of a low pressure in-tank boost pump in conjunction with an external, frame-mounted high pressure pump. The low pressure pump is used to provide pressurized fuel to the inlet of the high pressure pump and helps prevent noise and heating problems. System pressure is controlled by a pressure regulator mounted on the engine.
The other configuration consists of an in-tank high pressure pump which does not utilize a boost pump.


0900c15280053dd7.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 1: Disassembled electric fuel pump


REMOVAL & INSTALLATION

In-Tank Pump
See Figures 2, 3 and 4

  1. Disconnect the negative battery cable.
  2. Depressurize the system and drain as much gas from the tank by pumping out through the filler neck.
  3. Raise and support the rear end on jackstands.
  4. Disconnect the fuel supply, return and vent lines at the right and left side of the frame.
  5. Disconnect the wiring to the fuel pump.



0900c15280053dd8.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 2: Low pressure in-tank electric fuel pump


0900c15280053dd9.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 3: High pressure in-tank fuel pump


0900c15280053dda.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 4: Removal of electric fuel pump

  1. Support the gas tank, loosen and remove the mounting straps. Remove the gas tank.
  2. Disconnect the lines and harness at the pump flange.
  3. Clean the outside of the mounting flange and retaining ring. Turn the fuel pump lock ring counterclockwise and remove.
  4. Remove the fuel pump.

To install:
  1. Clean the mounting surfaces. Put a light coat of grease on the mounting surfaces and on the new sealing ring. Install the new fuel pump.
  2. Installation is in the reverse order of removal. Start the vehicle and check electric fuel pump operation. Check for fuel leaks.

High Pressure External Pump
See Figure 5
  1. Disconnect the negative battery cable.
  2. Depressurize the fuel system.
  3. Raise and support the rear of the vehicle on jackstands.
  4. Disconnect the inlet and outlet fuel lines.
  5. Detach the electrical harness connection.
  6. Bend down the retaining tab and remove the pump from the mounting bracket ring.
  7. Install in reverse order. Make sure the pump is indexed correctly in the mounting bracket insulator. Start the vehicle and check electric fuel pump operation. Check for fuel leaks.



0900c15280053ddb.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 5: High pressure external fuel pump

Feb 12, 2011 | 1985 Mercury Grand Marquis

1 Answer

Where is the fuel pump located on the 1990 E350 van chassis?


there are two fuel pumps, the 1st is inside the fuel tank, the high pressure pump is inside the frame rail on the drivers side just bleow and aft of the driver seat, this is gas engines only.

Oct 17, 2010 | 1990 Ford F250

1 Answer

Truck wont run as there is no fuel pressure at the rail. When I turn on the front fuel pump it appears to fill the back tank and come out the filler tube. I turn on the back fuel pump and it does the same,...


the switching valve has gone bad forgot exactly what ford called it but it might be tank isolater what is does is block which ever tank that is not in use to prevent what is happening to you the valve is stuck in neutral position causing no restriction liquid follows path of least resistance cut front tank on pump pushes fuel out gets to valve and instead of going to engine and building pressure it just runs over in the rear tank path of least resistance this valve should be frame mounted some where between tanks have seen on rear crossmember to

Aug 05, 2010 | 1992 Ford F250

2 Answers

1987 f-150 dual tanks fuel problem


You are right. There are three pumps. It sounds like the transfer pump in the front tank is bad. The in tank pumps just supply the high pressure pump to keep it primed. You need the front pump.

Sep 21, 2009 | 1987 Ford F 150

2 Answers

I dont know where the fuel pump is


inside gas tank if it is fuel injected

Jul 13, 2009 | 1989 Ford F 250

2 Answers

Fuel tanks not switching


the valve is on the inside of the frame rail drivers side about middle of truck.

Mar 01, 2009 | 1988 Ford F 250

2 Answers

F 250 WONT STAY ON


If your front tank was much less than 1/2 full you may have a bad pump in the front tank. each tank has a low pressure pump that feeds the high pressure pump on the frame rail. If the pump in the tank is bad, the high pressure pump will draw gas from the tank (especially the front tank) until the tank get below 1/2 full then it loses its prime and the engine will stall. Try disconnecting the electrical connection at the high pressure pump on the rail and then cycle the key on and off and see if you can detect the tank pump running or not.

Oct 12, 2008 | 1989 Ford F 250

3 Answers

Fuel pump bad?


Carburated engines is on the drivers side of the engine in the front Fuel injected are in the Tank and some high pressue system had an additional "pusher pump" on the frame rail

Aug 03, 2008 | 1989 Ford F 250

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