Question about 1989 Ford F 250

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1989 ford f-250 dual tank problems

I have the dual fuel tank, and the main tank isn't working properly, it will run fine and then occasionally the truck start to lost power, it's still running but won't accelerate, i switch the rear tank and it kicks back in and works great. I can even then switch back to the main tank and its' working again. anyone got any ideas?

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  • 10 Answers

Sounds like a problem with the switching valve under the truck, not the one on the dash, the first i would check that all hose clamps are tight

Posted on Jan 18, 2013

  • oneigavi
    oneigavi Jan 18, 2013

    well i replaced the fuel filter and checked all of the hoses and everything seems to work fine, i guess I could switch the hoses putting the main tank through the second tanks inputs on the switching valve and see if that's the problem.

  • Ken Nord Jan 21, 2013

    I would also check that the fuel cap or vent is working



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Posted on Jan 02, 2017

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SOURCE: 90 f150. when i switch to the rear fuel take the truck runs for

sounds like the diverter valve or the switch is defective

Posted on Apr 29, 2009

  • 1 Answer

SOURCE: fuel gauges no working 1989 ford f-150

drop the gas tank and either replace the fuel sending unit connected to the fuel pump, or you can try to clean the contacts w/ a pencil eraser, just be gentle

Posted on Mar 13, 2009

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SOURCE: Fuel pumps will not run!

Hey lets try this ! Locate your starter solenoid & look for a yellow wire marked with a "W" . That may be the fusible link for fuel pump. Let me know what you find.

Posted on Apr 14, 2009

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SOURCE: 1996 ford f150 with two tanks. Truck has been

You may have run out of gas in the front tank, but the gauge may have been reading the rear tank or the front sender is stuck. Is the fuel line switched electrically or manually controlled? How are the gauge connections switched?

Posted on Aug 14, 2009

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  • 92 Answers

SOURCE: 1997 F-350 Ford Powerstroke4x4 Crew

Have you changed your oil? Rotella 15W-40. These engines really don't like old oil. It becomes too thick for the injection pump to work correctly. Another possibility is a bad cam sensor on the front of the motor. Most engines call this the crank sensor but on this engine you have to look it up as a cam sensor.

Posted on Sep 29, 2009

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Related Questions:

1 Answer

Fuel pressure problem

Get fuel pressure tester to see if you don't have enough to start car. could be fuel line leak

Feb 08, 2014 | 1989 Ford F 250

1 Answer


Well yes and no. You can run on one tank, but you would need to cap the lines to the other tank to make sure fuel does not return to the wrong tank. The selector valve may be piped to allow fuel to flow back to either one.

Aug 28, 2012 | 1989 Ford F 250

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96 f-250 ex-cab the front tank isn't delivering gas to the engine & the rear tank is having trouble also. I changed the fuel pump in front tank but no help.

Fuel lines could be blocked or even partially blocked or a simple fuse. Try blowing out your fuel lines with an air hose and see if that makes a difference

Sep 07, 2017 | 1996 Ford F250 Crew Cab

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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

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1989 ford f-250 460 c. i. super cab with dual fuel tanks. Will only run on the rear tank and then forces gas out of the front tank thru the filler cap onto the ground. It will not start or run when...

I would suggest the Equalizer valve for the Twin tanks has failed. Track the fuel supply and return lines to locate its position.

Mar 14, 2011 | 1989 Ford F 250

1 Answer

What is a metal box in fuel line that is in addition to the filter on a 89 f 250

if you have dual tanks,then that's the cover to a secondary fuel pump{electrical} under drivers door? yes if so. that's the secondary fuel pump to the engine if you have dual tanks.remove the metal cover and you should see the secondary electric fuel pump. if the trucks not running right,then that may be your issue.hope this helps,thank you for choosing

Mar 01, 2011 | 1989 Ford F 250

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Wondering about the dual gas tank. Can I switch over from one tank to the next while I'm driving, or do I need to be stopped? Does it matter if I push the switch with it running, or with it turned off? ...

Yes, I would however suggest that you try this while sitting still first to make sure the control valve is still working. If it seems to work while sitting still then you can change between tanks anytime. The switch is only operational when the key is on and controls a valve body that changes from tank to tank. So as long as the valve is working and you have fuel or gas in both tanks you just fine.

Jul 29, 2010 | 1989 Ford F 250

2 Answers

My truck has dual tanks. Is the switching valve

no vaccum/ preasure control depending were fuel is coming from, i would suspect the switch or pump, not really the valve, good luck.

Oct 27, 2009 | 1989 Ford F 250

3 Answers

Location fuel filter 1990 F250 (dual tank)

the filter is located approx under the driver on the inside of the frame rail, I think you have plastic fuel line retaining clips in this year, so no tool required. see photo

Apr 22, 2009 | 1989 Ford F 250

1 Answer

1989 F250 Diesel twin fuel tanks fuel guage does not work

Dual tanks sound like the float in the tank is stuck. Need to make sure its not binding up. (I did alot of those jobs)

Mar 23, 2009 | 1989 Ford F 250

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