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
welcomed Oh and I'm
a 55 year old women
doing my own repairs
Thanks Guys

2 Answers


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

where is the fuse located that goes to these 2 fuel pumps . mine use to make a noise when you turned it on but now doesn't make a sound make me think its not getting electric

1 of 1 people found this helpful.

Your Answer

Ford F-150 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used GMC Sierra 1500
885 Great Deals out of 59,068 listings starting at $1,980
Used Ford Mustang
288 Great Deals out of 38,306 listings starting at $1,995
Used Ford F-250
415 listings starting at $3,500
Used Ford Explorer
832 Great Deals out of 64,080 listings starting at $2,000

Used Cars For Sale

2018 Ford F-150 For Sale
39 Great Deals out of 140,489 listings starting at $19,500
2017 Ford F-150 For Sale
173 Great Deals out of 11,385 listings starting at $18,450
2016 Ford F-150 For Sale
199 Great Deals out of 8,090 listings starting at $14,500
2015 Ford F-150 For Sale
331 Great Deals out of 10,345 listings starting at $11,990
2014 Ford F-150 For Sale
525 Great Deals out of 12,849 listings starting at $8,991

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.