Question about 1987 Ford F 150

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Well i have a f150 ford truck 4x4 duel tank i have been having tr

Trouble with fuel pumps going out where is the switch valve at for tanks on a 1988

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In driver side of frame before the high pressure pump or lift pump.

Posted on Sep 04, 2009

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My 1988 Ford F150 4X4 5.8L with duel tanks runs for about 10 mins then acts like it runs out of fuel and wont start back up. Ive replaced the fuel filters and the in-line fuel pump, pressure release valve...


With 2 tanks have you a balance pipe between tanks or a 2 way tap. IT sponds as if there is a low pressure problem ( vacuum) occuring as the pump draws out fuel and as atmospheric pressure is needed to push fuel to the pump the pump will not be able to keep up pressure . Check for correct fuel cap on both tanks and a balance tube between tanks to allow air to keep the pressure equal in the tanks

Mar 08, 2013 | Cars & Trucks

1 Answer

I have a 1991 F150 with duel tanks and a V8 engine 4X4 when I'm on the front tank it runs great but when I switch to the rear tank and give it gas it wants to "bog" down. but at normal spped it...


You need to check fuel pressure at the intake manifold for each tank, and see if you have a failing fuel pump. (Each tank should have it's own pump)

Apr 26, 2011 | 1991 Ford F150

2 Answers

I have a 1994 Ford F150 XLT with duel fuel tanks! I have a full tank in the front tank, but when hit the switch for that tank, the truck goes dead! What is the cause of this?


common on older high mileage fors to either have the switch go out or the intank pump go bad, you cang ground terminal 6 on the underhood diag plug with key on engine off and switch from front to rear or vice versa and listen for fuel pumps to be running, likely one is not

Nov 12, 2010 | 1994 Ford F150 Styleside Supercab

1 Answer

Where is a fuel pump located on a 1988 ford f 250 pickup my husban took a part off that hooked up to gas lines but auto zone says not a fuel pump


if it has duel tanks he removed the tank switching valve. the fuel pump is located in the fuel tanks there is one in each one. BUT NORMALLY IT'S THE TOGGLE SWITCH THAT GOES BAD ON THE DASH, OR THE SWITCH THATS IN THE FLOOR THE YEAR IS THE YEAR THEY SPLIT FROM MECHANICAL TO ELECTRIACL HOPE THIS HELPS.

Jun 13, 2010 | 1988 Ford F 250

1 Answer

My son ran my truck out of gas. Its a 1988 F250


first, is this a diesel? if it is there is a line or oring loose allowing it to **** air--diesels dont like leaks like that and there is a whole procedure for voiding the air from the lines on diesels. next could be the in tank pump and also does it have duel tanks? does the duel tank switch work? running out of fuel with in tank pumps can burn up the pump (the fuel itself provides lubrication and cooling for the pump, gas or diesel) and of course check the filter, running out and refilling could have disturbed trash in the tank

Oct 26, 2009 | 1988 Ford F 250

2 Answers

No power at fuel pump or crash switch


OK, you may have a dedicated pump for each tank, if so; DOES THE OTHER TANK WORK? If so, you have a problem with the switching system or second tank pump. You may have been testing the electrical, but remember: even a pump that works does not pump gas of there is a broken rubber feeder hose inside the tank. I would consider dropping the tank taht does not work and checking the pump and filter inside. Make sure key is on and test (usually the gray wire). Good luck.

Sep 10, 2009 | 1988 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

Not getting fuel to injecters


you have a tank switching valve under the truck that may be bad,also check the fuel lines coming out of the tank they could be cracked and sucking air instead of fuel

Apr 29, 2009 | Ford F-150 Cars & Trucks

1 Answer

Fuel gauge not working


yea fords with two tanks are known for getting stuck if you dont switch the tank constantly. you have to get to the valve that switches the two tanks, and free it up. it definitley isnt anything but the valve.

Mar 31, 2009 | 1988 Ford F 150

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