Question about 1989 Ford Econoline

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Front fuel tank not responding

I have a 1989 ford econoline e-150. It 2 fuel tanks, front and rear, and a switch under the dash to change between them. The front tank will not pump, but the rear tank works just fine.I checked the switch with a watt meter, I am getting voltage from both switch positive leads, but it is in a 1 second delay pulse, and only registering 4.5 volts/pulse. the same is coming through the input positive as well. I checked the other 3 leads on the ground side of the switch, and all 3 have continuity, but not full readings, as if the are going through a coil or something. I checked the power lines running to the fuel pump on both front and rear tanks, both have the same voltage/pulse as the positive leads on the switch under the dash. Is the problem my fuel pump, or did I miss something?

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Based on my 20 years in a Ford dealer your problem is the front pump.

Posted on May 21, 2009

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What is the size of the fuel tank on my 1989 Ford Econoline 150 van?


  • 1989 For E-150 fuel tanks for both the 6 and 8 cylinders utilize a 22 gallon fuel tank.

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Aug 16, 2011 | 1989 Ford Econoline

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

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Duel fuel tanks


you will need to replace the front intank fuel pump. the check valve in the pump has failed and the rear pump is pumping fuel into other tank ,

May 13, 2010 | 1989 Ford F 150

1 Answer

85 E350 Ford not switching from Fnt to RR fuel tank


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Jun 26, 2009 | 1985 Ford Econoline

1 Answer

Front fuel tank will not work


when switch is on front tank does the rear pump stay on if so the switch is probably bad remove switch from dash and test outputs out puts should switch when switch is moved if you need any further help let me know

Jun 01, 2009 | 1989 Ford F 150

1 Answer

Front fuel tank will not work


You have duel tanks with a fuel pump in each tank. You also have a fuel pump on the frame rail after the "tank selector". This device only holds a fuel filter that protects the main fuel pump. When you select front or rear tank on the dash, you are selecting which in tank fuel pump will operate. You can check the in tank fuel pump by listening for it to "humm" when the key is turned on..The in tank pumps only feed the main pump and cannot run the engine on their own. Hope this helps

May 16, 2009 | 1989 Ford F 150

1 Answer

Fuel is filling front tank from rear on 89 ford e150


Fords had this problem. I believe they actually had a recall notice about this problem. You have a fuel tank switch on the dash somewhere. This is where your problem is located. The switch has gone bad that switches from front tank to the rear tank. About $40.00 for the part.

Jan 23, 2009 | 1989 Ford Econoline

1 Answer

1987 ford 150 rear fuel tank not working


Remove the fuel selector switch from the dash, you can test it with a simple $8.00 swing volt/ohm meter. Its probably bad. Note there is a valve switch under the drivers door jam that selects witch fuel line to use, that is the second place to look. Hope it works..

Jan 14, 2009 | 1987 Ford F 150

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