1989 f 150- with 5.0 EFI Won't feed continous fuel, down powers, backfires, etc...

Asked by Apr 07, 2015 at 11:15 AM about the 1989 Ford F-150 XLT Extended Cab LB

Question type: Maintenance & Repair

Just started going down the road yesterday. Like it was dying out...pumped the gas to keep it moving. It has duel tanks. I switched tanks thinking it might be a problem with the gas, or that tanks internal pump. No change. I have since installed a new relay, fuel filter, and pressure pump (on the rail) and it did the same think this morning. I am really at a loss-its like it is not getting gas. Firing is good. Pressure in the gas line is good at the relief port on top of the engine. Any ideas?

1 Answer

21,090

A backfire normally indicates preignition on older vehicles relating to timing. It can be raw gas getting to the Cat Converter on newer vehicles and igniting which could be construed as a backfire. After determining which type of ignition system you have I would check along those lines first.

1 of 1 people found this helpful.

Your Answer

Ford F-150 Experts

  • #1
    OJ
    Reputation
    9,440
  • #2
    dandyoun
    Reputation
    4,640
  • #3
    tennisshoes
    Reputation
    3,270
View All

Related Models For Sale

Used GMC Sierra 1500
1,193 Great Deals out of 64,574 listings starting at $999
Used Ford Mustang
589 Great Deals out of 39,484 listings starting at $1,895
Used Ford F-250
447 listings starting at $3,997

Used Cars For Sale

2018 Ford F-150 For Sale
4 Great Deals out of 118,661 listings starting at $20,645
2017 Ford F-150 For Sale
175 Great Deals out of 27,664 listings starting at $16,402
2016 Ford F-150 For Sale
205 Great Deals out of 7,868 listings starting at $16,991
2015 Ford F-150 For Sale
524 Great Deals out of 11,405 listings starting at $11,990
2014 Ford F-150 For Sale
756 Great Deals out of 15,336 listings starting at $8,075

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.