Question about 1996 Ford F150 Regular Cab

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Fuel system when I fill up my rear tank and when im running off my rear tank it wants to pump gas out of the rear tank into the front tank which do not work. how do i keep it from pumping all my gas into the front tank which the fuel pump is out

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This just happened to me. Your front tank fuel pump is shot and inside the pump is a switch valve thats stuck half open and its pulling gas into the front tank. once it gets full it leaks out the gas cap. You should notice your truck holding back when your plaind off at about 25 mph. thats cause your only getting half the fuel to your injectors. you must replace the pump.

Posted on May 17, 2009

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Have the same problem, its the switch valve, not sure how to fix it yet. But i can tell you thats what it is.

Posted on Nov 13, 2008

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How To Drain Fuel Tank On 2005 Jeep Liberty Gas Tank


here is the Cherokee page.
read chapter, 14, page 19 on..
shows all way there, and is not easy.
why do this.
is pressure low
pump dead
is there 12vdc to pump cranking, (no? then dont do this)

http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

i have the KJ pages here. (line # messed up)
Two different procedures may be used to drain fuel
tank: through the fuel fill fitting on tank, or using a
scan tool.
The quickest draining procedure involves removing
the rubber fuel fill hose (7) (Fig. 25) from fuel tank
fitting.
As an alternative procedure, the electric fuel pump
may be activated allowing tank to be drained at fuel
rail connection. Refer to DRB scan tool for fuel pump
activation procedures. Before disconnecting fuel line
at fuel rail, release fuel pressure. Refer to the Fuel
System Pressure Release Procedure for procedures.
Attach end of special test hose tool number 6541,
6539, 6631 or 6923 at fuel rail disconnection (tool
number will depend on model and/or engine application).
Position opposite end of this hose tool to an
approved gasoline draining station. Activate fuel
pump and drain tank until empty.
If electric fuel pump is not operating, fuel must be
drained through fuel fill fitting at tank. Refer to following
procedures.
(1) Release fuel system pressure.
(2) Raise vehicle.
(3) If equipped, remove fuel tank skid plate.
(4) Thoroughly clean area around fuel fill fitting
(6) (Fig. 26) and rubber fuel fill hose (1) at side of
fuel tank. After cleaning, loosen fuel fill hose clamp
(2) at tank.
(5) Before removing rubber hose (1) (Fig. 26) from
fitting, note hose orientation while referring to marks
(3) and (4).
6) Disconnect rubber fuel fill hose at fuel tank fitting
(2) (Fig. 27). Using an approved gas holding
tank, drain fuel tank through this fitting.
Tank Removal
(1) If equipped, remove fuel tank skid plate and
tow hooks. Certain equipment packages will also
require removal of the trailer hitch. Refer to Tow
Hooks, Trailer Hitch or Skid Plate in 23, Body for
removal/installation procedures.
(2) Disconnect and separate fresh air tube (6) (Fig.
28) quick-connect fitting.
(3) Disconnect air tubes at front of NVLD pump
(9) (Fig. 28).
(4) Disconnect NVLD pump (9) (Fig. 28) electrical
connector.
(5) Disconnect fuel pump module electrical connector
jumper. This is located near front of fuel tank.
(6) Support tank with a hydraulic jack.
(7) Remove 4 fuel tank strap bolts (10) (Fig. 28) (2
at front of tank; 2 at rear of tank), and remove both
tank support straps.
(8) Carefully lower tank a few inches.
(9) Continue lowering tank while guiding remaining
hoses and lines through plastic isolator sleeve (3)
(Fig. 29).
(10) If fuel tank is to be replaced, remove NVLD
pump and fuel pump module from tank. Refer to
Fuel Pump Module Removal/Installation procedures.
end , tank out.

why not login to alldata.com and read
or buy the FSM,, and get all pages of chapter 14, end to end.

Oct 19, 2015 | 2005 Jeep Liberty

2 Answers

1987 f150 302 the truck runs only on front tank, but it pumps the tank into the rear tank then the rear tank overflows and you run out of fuel in the front, need a cheap quick fix to get through until the...


it sounds like the switching valve is no good and needs replacing.you can clamp off the fuel hose to the rear tank and just run off the front tank until you can get it repaired.

Apr 10, 2011 | 1990 Ford F150

1 Answer

I have no gas running to the engine from the front tank, and apparently have gas filling into the front tank from the rear tank. I can only use the rear tank. The switch is set for the rear tank and when I...


Hi:
I have had the exact problem on my ford truck, and fixed it. There is a tank feed shuttle valve mounted to the drivers side frame rail that is the most likely suspect. It operates by fuel pressure and when it fails, it fails so the front tank doesnt work.

It is worth mentioning that there are three fuel pumps on your truck, each fuel tank has a small low pressure pump inside the tank, and there is a high pressure pump located on the drivers side frame rail too, just before the fuel filter.

The front in the tank pump could be bad, too, but most likely the shuttle valve is the problem.

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1 Answer

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Ok sounds like a electrical problem being an 89 its fuel injected eather 5.0 or 5.8 each tank has its own fuel pump and sending unit a dashboard switch, relay, fuse and switching motor. check your fuel line from the front tank it could be clogged. check for 12v pwr. to the front pump the sending unit will require 4V but not much. as soon as the fuel rail pressureizes the ECM shuts the pump off using the relay. Usually the tank switch goes bad first.

Sep 12, 2010 | 1989 Ford Econoline

1 Answer

My 1994 f250 will not start when the fuel tank toggle switch is on the front tank. it runs fine on the rear tank, im thinking clogged fuel filter or possibly fuel pump stopped working. where do i find the...


the problem is the fuel pump inside the front tank is defective, it is not a fuel filter, the fuel from both tanks fuel pumps runs through the same filter

Feb 18, 2010 | 1994 Ford F250 Supercab

1 Answer

Front tank fuel gauge not working


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2 Answers

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1 Answer

Gas leaking out where you fill the front tank


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Jun 18, 2009 | 1990 Ford F150

2 Answers

1992 f-150 dual gas tanks tank closest to cab of truck pumps gas out the fuel cap


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1 Answer

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