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

Asked by rbl11001 Apr 07, 2015 at 11:15 AM about the 1989 Ford F-150 XLT Lariat 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
73,340

OJ answered 9 years ago

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 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • 1989 f 150- with 5.0 EFI Won't feed continous fuel, down powers, backfires, etc... 1 Answer

    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 int...

    1989 Ford F-150 XLT Lariat Extended Cab LB

    -

    Maintenance & Repair

  • 1989 Ford F-150 5.0 5 Speed Manual Stalling 1 Answer

    So, my 89 Ford F150 I picked up for $500 is giving me a problem. When I first start up I here my High Pressure Pump on the frame wind up and the truck shows about 15-20 PSI on rail. After starting s...

    1989 Ford F-150 XLT Lariat Extended Cab 4WD LB

    -

    Maintenance & Repair

  • Motor dies, will crank,won't stary, 5.0 2012 F 150 1 Answer

    Motor dies, cranks , won't start . After setting for an hour so starts. 2nd time mechanic suggested checking fuel pump relay fuse (#27) did, replaced and starts immediately. Only one questi...

    2012 Ford F-150 XLT SuperCrew 4WD

    -

    Maintenance & Repair

  • 1989 Ford F-150 2 Answers

    I put a new starter in a 1989 F150 and now it just humms loudly when I turn the key, but doesn't start. Did I put the starter in wrong?

    1989 Ford F-150 XL Standard Cab 4WD SB

    -

    Maintenance & Repair

  • 1992 Ford F-150 5.0 1 Answer

    Hey guys maybe y'all can help me out my truck runs take off fine but not like it should once I hit 25 to 30 it won't get up an go feels like I'm putting around now was working fine till yesterday ...

    1992 Ford F-150

    -

    Maintenance & Repair

Shortcuts

Search Ford F-150 Questions

CarGurus Experts

  • #1
    OJ
    Reputation
    41,850
  • #2
    Gene Arnett
    Reputation
    15,990
  • #3
    Rowefast
    Reputation
    15,480
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used GMC Sierra 1500
124 Great Deals out of 7,846 listings starting at $5,500
Used Ford F-250
6 listings
Used Ford Ranger
22 Great Deals out of 695 listings starting at $6,445
Used Ford Mustang
42 Great Deals out of 1,603 listings starting at $8,995

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. Content will be removed if CarGurus becomes aware that it violates our policies.