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Ford F-Series Fuel Pump/Fuel System



  • Thanks for the help. I will let you know how it works out.
  • I'd also like to know how it works.
    Thanks Stan 58
  • xman3xman3 Posts: 3
    have a 92 f150 8' bed with two tanks. need to remove the front tank pump-sender. does anyone know if this is possible without removing tank. looking at this seems possible, but do not know if length of unit will come all the way out.thanks.
  • There is only two ways to remove the fuel pump assembly. Dropping the tank down or lifting the bed up. The fuel pump assembly and hanger is about 11 inches long and fragil. Do it the right way.

    Here is the trick. Drain the tank of fuel. Use motor cycle straps to secure the tank in place while you remove the two tank straps completely. Motor cycle straps almost work like a pully so you can lower the tank down slowly to undo fuel lines ect without breaking them. Good luck with it.
  • howie6howie6 Posts: 1
    I have a 1994
    f150 - trying to replace the rear gas tank. But I don't know how to disconnect those fuel lines. there is a clip on the lines themselves right in front of the gas tank and I have removed, does the lines then just pull apart?
  • Ford uses 2 types of clips, metal and plastic. If you have the metal ones you have to use the disconect tools to release them. If they are plastic, you simply depress the 2 white in color tabs inward at the same time and tug on the line.
  • hd82hd82 Posts: 13
    My '07 F-250 message center is showing "WATER IN FUEL", this is my first diesel so I am ignorant to the maintenace and repair. Can someone help me with this message. From reading some of the posts I understand there is a drain on the filter, where is it, should I use some sort of dryer in the fuel?
    Thanks in advance
  • mschmalmschmal Posts: 1,757
    or Diesel Supplement on how to drain the water seperator.

    PS, if you waited for the message to come on, you waited 2 long. You should check your water seperator monthly at least.

  • Rick here from Miami Fl. I just finished installing the front fuel pump in my 94 F150. I had to remove the drive shaft and the tank, cause the pump sits on top of the tank. my truck has two tanks also and on the inside of the cab by the plastic kick plate by the drivers side and passangers side are two reset switches for the fuel pumps. you may want to check this.

  • I recently replaced the front tank fuel pump on my 94' F150. after installing it, I turned the key on without starting it, and the pump would run for about 4 or 5 seconds then turn off. telling me that it got up to pressure. after a few days of trying to trouble shoot why it's running rough, I noticed that now the fuel pump dosn't stop. just sitting in the drive way I've wasted about a 1/4 tank of gas. lots of black smoke and black soot all over the floor. I removed the 20 Amp fuse to the fuel pump and it idles perfect. can the pump be over pressurizing, hence the pressure regulator be bad? There are two what I call top hats, they look like a 1 to 1 1/2 inch silver can thats in-line with the incomming fuel line and one in the loop that feeds the injectors. which ione of these is the fuel pressure regulator?


  • Your fuel pressure regulator is always mounted on the fuel rail with a vaccum hose connected to it. Look for raw fuel leaking past the diaphram and being sucked through the vaccum line, this might be the cause of the black soot. The other inline device you described is most likely a one way check valve. Please understand, Ford used numerous designs for duel tanks and there is also a lot of what is clasified as conversions, an added tank set up.
  • thank you for your reply. I know that I have multiple problems with the truck again it's been sitting for 5 years. with no battery in it. after installing the new front tank pump, for the first day I got the engine to start, idle was check engine light. all seemed well. but now its eating full like crazy and thats just sitting in the drive way. can you direct me where to go to learn how to do the paper clip method the get codes from the computer?

    thanks again

  • I would like to find out where I can get a ECM for my 94' F150. preferably re-conditioned.

  • We bought a 2001 F150 last year from my inlaws and two days ago it just stopped running. My husband believes that it is the fuel pump, which from what I am reading sounds like a very involved process to change, but his father indicated he just had the fuel pump changed out two years ago. Is it common for this to occurr with F150's or is there something else we should be looking at before we try changing the fuel pump?

    The check engine light is not on and we have already changed the filter.

    Thanks for any advice.
  • Make sure the fuel cut out switch is operating. This switch cuts off the fuel pump in case of a collision. It is located inside the front seat passenger side kick panel . You should have had to unplug this switch to change out the fuel filter. There is a reset button on this switch make sure it has not tripped.
  • asalleeasallee Posts: 3
    I have a 1986 F250 XLT 4x4 w/4 barrel carb. Tons-o-miles. Duel fuel tanks that I have not been able to use (at least not the rear one). Front one was working fine. The truck started to run rough and use fuel like I had stock in Shell! Not good. Now it seems to get no fuel to the fuel filter (its clear glass) and I have never been able to hear a pump running. Is there a pump in both tanks? What is the device mounted on the frame rail beside the forward tank that has all the fuel lines and electrical connection going to it?
  • mike9408mike9408 Posts: 74
    I would suggest checking the fuel pressure regulator on the engine. It sounds to me like your regulator is returning most of the fuel to the tank, thus taking longer to shut off, especially since you are having the same problem with both tanks. Mike
  • mike9408mike9408 Posts: 74
    I would say that the device in the frame rail next to the forward tank is an external fuel pump or your selector valve. If the selector valve is not working you would only be able to use the fuel from the tank it is set on. Check your fuse pannel to see if the fuse is blown on either pump and the selector valve. If you find blown fuses, correct the problem with the wiring etc and replace the fuses, this should make both tanks useable. Mike
  • terny1terny1 Posts: 1
    It's an 88 f150 4x4 302 efi 5 speed stick dual tanks. I turn key on and the fuel pump under the cab makes a noise (no fuel pumpin) I can mess with it either by turning key on & off or squirt gas into intake and it will quiet (catch a prime) and start but smokes (black). It'll run great til the pump loses prime. Could it be filters clogged or is the pump going bad. It has always had a problem when rpms over 3000 like it runs outa gas but other than that it has been a great ride until now. I'm confused. Thanks fer any assistance. TWN...
  • help21help21 Posts: 2
    1986 f150 i pulled the line off of the pressure pump on the driver side frame turned key on to see if fuel would pump out and it did nothing,also checked the inertia button,turned the key on to see if the pressure pump worked , it clicked one or two times,if i put gas in the motor it will fire,it had two new fuel pumps put in the tanks a few years back and a little gas put in it to see if it ran and it did,but it has sat ever since,can u please help me?!
  • help21help21 Posts: 2
    that 86 f150 has a 302 two wheel drive auto
  • randy714randy714 Posts: 2
    hi,can anyone tell me how to disconnect a fuel 94 f150 has a bad gas leak,so i dropped the gas tank and need to know how to disconnect the lines,then i can put in the new tank.please help :mad:
  • mike9408mike9408 Posts: 74
    special tool sold in most automotive parts stores, is a collar that fits around smaller end of the two lines, push collar into coupler releases multipul fingers which spring out to larger part, once collar is pushed in just work lines apart, good luck mike0408
  • mike9408mike9408 Posts: 74
    special tool sold in most automotive parts stores, is a collar that fits around smaller end of the two lines, push collar into coupler releases multipul fingers which spring out to larger part, once collar is pushed in just work lines apart, good luck mike9408
  • oldford2oldford2 Posts: 2
    This problem has plagued me for some time.It seems if the truck sets for a couple of days when I try to start it, it will start and then stall and the fuel pump will keep running and flood it out.Attempts to restart it are impossible until much later.Last time it did this I was under way and I tried to restart it by popping the clutch as it was still rolling and blew the muffler wide open. Sometimes it will run for weeks and no problem then all of a sudden Bingo. There is a leak from the top of the gas tank and am having it replaced this weekend but don't know if this is the cause. Any suggestions?
  • oldford2oldford2 Posts: 2
    In replaceing the gas tank my mechanic noted that the four prong electrical connection to the tank had deteriorated and was making a poor contact and so spliced in another he got from the junk yard and PRESTO all my problems disappeared and she now runs like a new one. Just something else to look out for when one runs erratic.
  • mike9408mike9408 Posts: 74
    I found I had the same type of problem on my 1991 F150. It actually happened to me twice. found that with all the arching at the posts the temper had been lost at the post clips, just kept happening. So I went down to the hardware store and bought 4 wire kerneys (for #12 wire),cut the burned spring clips off the old harness and kernied the wire to the posts. This finished the problem for good. I had done it so many times that I cut an access hole in the bed above the connector and make a trap door just for this problem. Mine works great now...
  • sadcampersadcamper Posts: 1
    i'm new to this site and am having the same problem with my 1989 ford f150 rv.
    where do I get some answers to this problem. Have already replaced fuel filter.
    I head out to go camping and the truck runs fine for about 1 hour the first time and about 45 min. the second time. I don't trust it now.
  • mike9408mike9408 Posts: 74
    As stated before, the problem with mine was the quick connect at the fuel tank. I believe Ford made the clips too lite. They beggin to arc and corrode, when this happens it looses contact and the fuel pump (in the tank) shuts down. To correct it you need to come up with a better way to make the connection at the fuel tank as I did. Mike9408
  • picco63picco63 Posts: 2
    I have a 94 F-150 inline 6 engine with two in tank fuel pumps. I can't seem to get them to work. I put a new pump in the rear tank, changed all my fuses and relays, and finally installed a new wiring harness for the fuel system. All the parts I changed were genuine ford parts. Need help on what to do next.
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