Question about 1990 Ford F250

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I there a reset button for fuel pump on 1990 F250 pickup

Duel tanks, back tank pump come on, but front tank pump will not come on, Checked fuses nothing blown. Please Help

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Sounds like a bad fuel pump. There is a fuel pump inertia cutoff switch, but that will cut off both fuel pumps.

Posted on Apr 24, 2015

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You know, sometimes a pump goes bad and needs to be replaced. Have your mechanics test it

Posted on Feb 12, 2015

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1 Answer

I have a 1990 f250 ford pickup 7.5 liter engine duel tanks i replaced both pumps and line and the relay fuse it will start but wont stay started


You actually have a total of 3 pumps on this truck. You have a helper pump in each tank and a pressure pump located inline just under the drivers side cab area, attached to the frame underneath the truck. The most frequent problem in this area is the valve that switches between the two tanks. Ford did correct this problem in later years, but in the 87 to 91 model years, they all had the potential for this very issue. Try running your truck on both tanks. If one operates correctly and the other does not, and provided you have changed out the in tank pump of both tanks and the one located on the frame, then I would say your problem is most likely the tank changing mechanism.

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Backfiring is not going to have anything to do with the level of fuel in the tank. You most likely have burned valves or broken valve springs in your engine. I would do a compression test.

Mar 26, 2011 | 1990 Ford F250

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I have a 90 F250 4x4 with dual gas tanks. The rear tank needed a new pump so had it replaced. Now, I got a new problem, the back tank pumped fuel into the front tank to a point gas flowed out the filler...


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I would start by checking you switch for the tanks to make sure it is working right and if the front tanks fuel pump does not work after you check the switch I would get a 12 volt electrical test light and see if your getting power to the front fuel pump if your getting power to it I would say you have a bad pump . But some times the pump will run but the diaphragm gets weak in them.

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