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

19,300

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

Add photo

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 Extended Cab LB

    -

    Maintenance & Repair

  • 1988 ford f-150 efi 2 answers

    I have fuel and spark no fire crank and nothing have fuel in to injection rail

    1988 Ford F-150 S Standard Cab 4WD LB

    -

    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

  • Ford f 150 won't start 4 answers

    I have a 1989 Ford F 150 and have replace the battery, starter, alternator, and water pump recently. It will run for a day or so then the battery acts like it is dead and won't start? Any idea what...

    1989 Ford F-150 STD Standard Cab 4WD LB

    -

    Maintenance & Repair

  • F 150 won't start 3 answers

    I have a 2000 f150 4.2 truck won't start without starter fluid. Once it starts it will stay running. I changed my fuel pump, fuel filter and fuel regulater. I checked the inertia switch.Any ideas?

    2000 Ford F-150 XLT Extended Cab SB

    -

    Maintenance & Repair

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 8,480
#2 dandyoun
dandyoun
Reputation 4,420
#3 tennisshoes
tennisshoes
Reputation 2,940
View All

Related Models For Sale

Used GMC Sierra 1500
783 Great Deals out of 68,500 listings starting at $1,800
Used Ford F-250
462 listings starting at $4,690
Used Ford Mustang
687 Great Deals out of 44,970 listings starting at $750
Used Ford Ranger
178 Great Deals out of 5,613 listings starting at $1,200

Used Cars For Sale

2018 Ford F-150 For Sale
669 listings starting at $29,070
2017 Ford F-150 For Sale
52 Great Deals out of 126,082 listings starting at $18,199
2016 Ford F-150 For Sale
105 Great Deals out of 9,679 listings starting at $16,990
2015 Ford F-150 For Sale
217 Great Deals out of 8,682 listings starting at $15,990
2014 Ford F-150 For Sale
355 Great Deals out of 12,399 listings starting at $9,900

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.