Does one fuel pump operate dual fuel tanks

Asked by Apr 14, 2017 at 06:31 AM about the 1990 Ford F-150 XLT Lariat 4WD LB

Question type: Maintenance & Repair

Is there one or two
fuel pumps for dual
tanks truck ran great
then I went to
accelerate and my
truck would not pick
up enough fuel to
move the truck and
would stall. Then it
would not pick up any
fuel to start Please
help all answers and
suggestions
welcomed Oh and I'm
a 55 year old women
doing my own repairs
Thanks Guys

1 Answer

100,445

There are pumps in each tank. When the ignition switch is first turned on the pump will run for a few seconds then shut off if the engine is not started, so you will have to jumper the fuel pump relay to run pressure tests on those pumps. Another thing to check is the switching valve, sometimes these mess up and won't switch all the way so even if you have pressure the valve won't switch, also some models had a filter inside the unit that can plug up over the years. HTH

1 of 1 people found this helpful.
Best Answer Mark helpful

Your Answer

Ford F-150 Experts

  • #1
    OJ
    Reputation
    8,940
  • #2
    dandyoun
    Reputation
    4,550
  • #3
    tennisshoes
    Reputation
    3,070
View All

Related Models For Sale

Used GMC Sierra 1500
890 Great Deals out of 65,682 listings starting at $1,995
Used Ford Mustang
710 Great Deals out of 38,332 listings starting at $895
Used Ford F-250
474 listings starting at $6,694
Used Ford Explorer
857 Great Deals out of 63,883 listings starting at $1,000

Used Cars For Sale

2018 Ford F-150 For Sale
34,320 listings starting at $19,355
2017 Ford F-150 For Sale
119 Great Deals out of 79,324 listings starting at $17,989
2016 Ford F-150 For Sale
130 Great Deals out of 7,800 listings starting at $18,989
2015 Ford F-150 For Sale
303 Great Deals out of 10,847 listings starting at $15,995
2014 Ford F-150 For Sale
441 Great Deals out of 13,917 listings starting at $10,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.