Question about 1988 Ford F 250

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Truck backfires runs bad when switch to front tank

Switch to rear tank runs fine

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 184 Answers

SOURCE: 1990 ford f150 has dual tanks. gas pumps from rear tank to front

See these two threads for more info, I've heard of this happening before, in fact at one time there was a recall from Ford regarding this exact issue - http://www.fordf150.net/forums/viewtopic.php?p=227833 - http://www.fordf150.net/forums/viewtopic.php?p=46861

Posted on Feb 12, 2009

  • 17 Answers

SOURCE: fuel tank selector

Hello. The part you need is part#E5TZ *9189*A valve asy.

Posted on Sep 17, 2009

johnjohn2
  • 5763 Answers

SOURCE: 1986 F150: Rear gas tank results in engine sputtering/dies

i think u have a bad fuel pump, switching unit does nothing but not allow fuel to be pumped from tank to tank, for example if useing rear tank lets feul flow to engine not iti nto frt tank,when it goes bad you will see gas flowing out of frt tank because its pumping into tank from rear tank,good luck.check fuel preasure w rear tank is on.

Posted on Oct 06, 2009

Testimonial: "Thanks for the response. I checked w/the Ford dealr parts guy who said each tank pumps directly 2 engine. Not sure how it works on other trucks tho."

emissionwiz
  • 75774 Answers

SOURCE: 1990 Ford F 150. Has duel gas tanks. When switch

the electric fuel pump is defective in the rear tank, each tank has its own pump

Posted on May 21, 2010

  • 1 Answer

SOURCE: when I switch from my front fuel tank to my rear tank gas stops

There is no selector valve on a 1995 ford f150 300 engine. The selector switch on the dash sends power to the pump in the selected tank. The pump then sends fuel to the engine. If engine won't run on the selected switch, the pump in that tank needs replaced.

Posted on Oct 24, 2010

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1 Answer

I have a 1995 Ford F-150 with a 300 six, it has a full ffront tank and runs like it's running out of gas, I switch it to the rear tank, it runs fine.How do I fix it?


You probably have a bad fuel pump in the front tank. There are other possibilities as well. I have replaced tank switches for this reason also. You need to check for power and ground at the front tank when the switch is in the front tank position and the ignition switch is turned on.

At the wiring connector that goes up to the tank, (on the frame rail next to the tank) the power wire is the RED wire and the ground wire is the ORANGE wire. (The other wires are for your fuel gauge.)

The fuel pump relay will supply voltage to the RED wire for only about 2 or 3 seconds (to prime the fuel rail) when the ignition switch is turned to the ON position, so you will need a helper to check this.

If there is no power, then you should suspect the switch. However, check for power at the switch to verify that it is the switch and not a broken wire between the switch and the tank connector.

If power and ground are both present at the tank connector, replace the front fuel pump.

May 25, 2012 | 1986 Ford F 250

1 Answer

Can't use front tank. i fill the rear tank, front tank eventually fills up. switch to front tank, it'll run for about 5 minutes then stall. then i switch to rear...fine. why is the front tank filling up...


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

2 Answers

1986 F150: Rear gas tank results in engine sputtering/dies


you are going to have to replace the in tank low pressure fuel pump, we call this the "lift" pump.

Oct 06, 2009 | 1986 Ford F150 SuperCab

1 Answer

85 E-350 fuel problem


there is a switching valve under the vehicle that switches from front to rear. it may have gone bad or the switch itself may be bad

Oct 03, 2009 | 1985 Ford Econoline

1 Answer

1996 ford f150 with two tanks. Truck has been running fine and normal til today. Wouldn't start, but when I switched tank from front to rear it started fine and ran fine.Any ideas?Thanks


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?

Aug 14, 2009 | Ford F-150 Cars & Trucks

1 Answer

85 E350 Ford not switching from Fnt to RR fuel tank


85 ford 350 econoline van with 460 engine and duel tanks, lost prime on both tanks, cannot get gas up to inlet on carb, it happen after having shot work on vaccum lines, i can't hear the pumps in the tanks making a buzzing noise, i hear a click when i switch from front tank to the rear tank , somewhere under the hood, on the driver side front fender, what is the next step.

Jun 26, 2009 | 1985 Ford Econoline

1 Answer

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


sounds like the diverter valve or the switch is defective

Apr 29, 2009 | 1990 Ford F150

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