Question about 1990 Ford F150

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1990 f150 front fuel tank not working, what are the most common areas to check and where are they?

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  • 2 Answers

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Posted on Jan 02, 2017

MrRodneyLong
  • 55 Answers

SOURCE: 95 F150 2wd, interrupted fuel from the front fuel tank

my idea, the pumps are working agianst each other. what is the line pressure supposed to be? I think the rear pump is burning the new pumps up. is the rear pump running when the front pump is running? Let me know MrrodneyLong@gmail.com

Posted on Jul 04, 2008

  • 29 Answers

SOURCE: 1990 F350 dule tank Fuel guage does not work

i have had this problem before these trucks are famous for the fuel gauges not to work in the back of the dash panel there is a nine volt battery that runs power to it and might be dead

Posted on Oct 27, 2008

  • 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

  • 975 Answers

SOURCE: I have a 96 f150 with 2 fuel tanks the back fuel

Yes,Ford sells the fix,a check valve that just snaps on to the fuel line .

Posted on Nov 14, 2010

mabpest
  • 1152 Answers

SOURCE: I have 1990 Ford F150 with 2 gas tanks.Electric

check fuel relay under the hood..it may be blown..look in owners manual for relay location.

Posted on Feb 14, 2011

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1990 f150 gas goes from rear tank 2 front tank whats the problem


Hi, welcome to FixYa.com my name is Shawn and I will be answering your question.

They had a campaign back in 1990 where they replaced the fuel pressure regulators and installed one way check valves on both fuel tanks to prevent your concern.

I hope my assistance helped you and resolved your concern, if you need further assistance please ask.

Aug 08, 2011 | 1990 Ford F150

2 Answers

1987 f150 302 the truck runs only on front tank, but it pumps the tank into the rear tank then the rear tank overflows and you run out of fuel in the front, need a cheap quick fix to get through until the...


it sounds like the switching valve is no good and needs replacing.you can clamp off the fuel hose to the rear tank and just run off the front tank until you can get it repaired.

Apr 10, 2011 | 1990 Ford F150

1 Answer

Where is the fuel tank selector valve on a 1990


check inside of the frame drivers side by the rear wheel

Jan 14, 2010 | 1990 Ford F150

1 Answer

1990 F-150, 2X2, 5.0, dual tanks, ..... no power to either fuel pump. I have replaced the fuel pump relay and the EEC relay. I have also run resistance and voltage checks at the relay harnesses. I am...


You need to check the switch on the dash for the tanks. Brown/White powers the REAR tank, Red powers the FRONT . RED/YELLOW is power, if there is no power on the red/yellow, check the "Inertia" switch. Matter of fact, check the Inertia switch FIRST. Its in the dash area near the brake pedal, maybe in the kick panel, it should be marked.

Dec 18, 2009 | 1990 Ford F150

2 Answers

Front fuel tank, works switch it over back dose not work, No noise in the rear tank, noise in the front.


your switcher valve may be bad. its located in front of the front tank on the frame rail and has fuel and one electric connection.

Nov 20, 2009 | 1990 Ford F150

2 Answers

First front fuel pump stopped working then next rear fuel pump stopped working pumps both work tried relays that didnt work fuses checked as well so now what


Check the engine to body ground strap. Top rear of engine screwed to firewalll. Or ground the tank to the frame.? Good luck

Nov 18, 2009 | 1990 Ford F150

2 Answers

Back fuel pump is running all the time and is pumping fuel into front tank on a 1990 ford f150


I would drop the tank and replace the pump. These types of problems are fire hazard.

Oct 26, 2009 | 1990 Ford F150

1 Answer

How do I remmove secondary fuel tank which is leaking?


there should be two straps holding the tank in place,,,,if you remove them the tank should drop down to where you can disconnect the feeder hose and go from there

Feb 20, 2009 | 1990 Ford F150

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