Fuel issue has me stumped!!!

Asked by Dec 20, 2015 at 03:56 PM about the 1989 Ford F-150 XLT Standard Cab SB

Question type: Maintenance & Repair

1989 f150 4.9l 2wd lariat with dual tanks

I am a first-time poster, tapping out to a fuel issue! I
was driving down the road, truck wasn't getting
enough gas sputtered badly then died. Got it towed
home (thanks roadside assistance!). Replaced the
in-line fuel pump and fuel filter.

I still cannot get any pressure to the fuel rail. I
disconnected the hose from the in-line pump to the
reservoir, put it into a gas can, and the in-line pump
pressure rises rail perfectly. So I know it has to be
upstream of the reservoir. I can hear both the front
and the rear tanks pumps running when I turn the
key on. However, when I disconnect the front and
rear fuel lines from the reservoir, neither one in
pumps fuel out of the lines.

it has me really confused! Is it possible that both my
front and rear in tank pumps went out at the exact
same time? To where they would be able to run, but
supply zero fuel? What else could it be?

I have checked voltage to the front in tank Pump
and it is a perfect 12 V.

5 Answers

27,105

did you blow out / clean the fuel lines?

Everything downstream of reservoir. However what are chances of both tanks' pumps and/or lines both getting clogged?!

52,055

Could there be an issue with the valve that switches between the tanks?

Don't think so. Have pulled both lines from both in tank pumps from the reservoir valve and neither pump is spitting out fuel

52,055

Then the in tank pumps are bad or their pick up screens are clogged.

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 182,094 nationwide F-150 listings starting at $1,000.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    8,930
  • #2
    dandyoun
    Reputation
    4,540
  • #3
    tennisshoes
    Reputation
    3,060
View All

Related Models For Sale

Used GMC Sierra 1500
887 Great Deals out of 65,336 listings starting at $1,995
Used Ford Mustang
705 Great Deals out of 38,301 listings starting at $895
Used Ford F-250
471 listings starting at $6,694

Used Cars For Sale

2018 Ford F-150 For Sale
30,907 listings starting at $20,990
2017 Ford F-150 For Sale
118 Great Deals out of 81,065 listings starting at $17,990
2016 Ford F-150 For Sale
127 Great Deals out of 7,670 listings starting at $18,989
2015 Ford F-150 For Sale
299 Great Deals out of 10,610 listings starting at $14,999
2014 Ford F-150 For Sale
432 Great Deals out of 13,784 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.