1989 f150 fuel delivery problems
40

Asked by KOglesbee Feb 26, 2018 at 09:43 AM about the 1989 Ford F-150 S Standard Cab LB

Question type: Maintenance & Repair

Recently purchased a 1989 f150 with 4.9l. It had
something continuing to run after ignition was off.
First tried cooling fan for injectors with no luck.
Tried unplugging fuel relay and that stopped it.
Replaced fuel relay and truck seemed ok. I started
it several times and let it idle for about 30 minutes
with no problems. Tried to drive it that night and it
only went about 1/12 miles, sputtered and died. It
has 1/2 tank of gas and I checked the inertia
switch which seems ok. It will now start
occasionally but will not run.Any thoughts?

2 Answers
40

KOglesbee answered 6 years ago

According to my research there are two. A low pressure pump and sending unit in tank, and a high pressure inline pump under the cab. I am starting by replacing the inline pump and filter. Will post how it goes. Thanks for input.

1 people found this helpful.
Mark helpful
40

KOglesbee answered 6 years ago

Replaced external fuel pump and filter and truck does not run. Will run with starting fluid for less than 1 minute and then dies. Next step appears to be replacing the in tank pump. Anyone have any other suggestions?

3 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • 1989 f150 fuel delivery problems 2 Answers

    Recently purchased a 1989 f150 with 4.9l. It had something continuing to run after ignition was off. First tried cooling fan for injectors with no luck. Tried unplugging fuel relay and that stopped...

    1989 Ford F-150 S Standard Cab LB

    -

    Maintenance & Repair

  • 1989 F150 Fuel problems. 16 Answers

    I have a 1989 Ford F150 with the 5.0 fuel injected. Its not getting gas and I don't know where the problem begins. I know its getting fuel up to the fuel pump by the driver's door. but not sure about ...

    1989 Ford F-150

    -

    Maintenance & Repair

  • 1989 F150 fuel problem 1 Answer

    I replaced the clutch and slave cylinder by sliding back trans, ran great for 2 days. Started running warm and sluggish. Had it scanned came up as short in ground wire to fuel pump. Fixed only short i...

    1989 Ford F-150

    -

    Maintenance & Repair

  • 89 f150 5.0 fuel problems 7 Answers

    I bought a 89 f150 cheap from a dealership had no problems for 6 months, then all of the sudden it broke down on the highway I was pushing the gas and it was slowing down when I pressed it. I've re...

    1989 Ford F-150 XLT Lariat Extended Cab LB

    -

    Maintenance & Repair

  • 2003 4.6L f150 fuel problems 7 Answers

    Hey, guys new to this site, having fuel problems with a 2003 F150, been a good for Truck for 147,500 mile, until it stopped. Replace fuel pump, wrong!! Problem, contacts on both fuel and pcm relay c...

    2003 Ford F-150 XLT Extended Cab SB

    -

    Maintenance & Repair

F-150

Looking for a Used F-150 in your area?

CarGurus has 13,693 nationwide F-150 listings starting at $3,800.

Postal Code:

Shortcuts

Search Ford F-150 Questions

CarGurus Experts

  • #1
    OJ
    Reputation
    41,830
  • #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
139 Great Deals out of 8,257 listings starting at $3,000
Used Ford F-250
6 listings
Used Ford Mustang
41 Great Deals out of 1,643 listings starting at $7,999
Used Ford Ranger
22 Great Deals out of 701 listings starting at $8,800
Used Jeep Wrangler
142 Great Deals out of 5,984 listings starting at $6,500
Used Toyota 4Runner
23 Great Deals out of 545 listings starting at $12,999

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.