1989 Ford f150 4.9l will not run when warm
35

Asked by Alan Apr 14, 2015 at 10:56 AM about the 1989 Ford F-150 XLT Lariat Standard Cab LB

Question type: Maintenance & Repair

Can anyone help - I have a 1989 F150 xlt lariet 4.9l stright 6. It runs really well till it warms up. I have replaced the following: new low pressure in tank fuel pump - new fuel filter x3 - new complete distribtor - new alternator - new battery - new plugs - and a new coil. Both Cats are clear as we dug them completely out and then welded them shut (both of them) Air flow at exhaust much improved. - - - This Trk starts and runs really strong when Florida cold. It varies how long it will run but not long then it starts to die as if it is getting fuel starved. Last time it did it I crawled under the trk and high pressure fuel pump is cool to the touch - filter was clear and I could blow through it both ways

5 Answers
103,825

Reelin68 answered 9 years ago

Replace you Engine Coolant Temp sensor. See if that cures it. Post back with results.

1 people found this helpful.
Mark helpful
35

Alan answered 9 years ago

I will do that and let you know. You are referring to the one mounted in the termostat housing right?

Mark helpful
35

Alan answered 5 years ago

nope - ended up being the fuel distribution reservoir for 2 tanks!

Mark helpful

Your Answer:

Related Questions

  • 1989 Ford f150 4.9l will not run when warm 5 Answers

    Can anyone help - I have a 1989 F150 xlt lariet 4.9l stright 6. It runs really well till it warms up. I have replaced the following: new low pressure in tank fuel pump - new fuel filter x3 - new compl...

    1989 Ford F-150 XLT Lariat Standard Cab LB

    -

    Maintenance & Repair

  • 1989 f150 electornic fuel pump will not shut off 2 Answers

    I have a 1989 f150 and my electronic fuel pump has just started to run constantly. I unplugged it and it shut off, however when I started the truck and shut it off again it continued to run. It is als...

    1989 Ford F-150 XL Standard Cab 4WD LB

    -

    Maintenance & Repair

  • 1989 ford f150 not staying running 4 Answers

    I have a 89 ford f150 with a straight line 6 in it that wont stay running line it's not getting any gas i put all new fuel pumps and filter wont else could it be

    1989 Ford F-150 S Standard Cab LB

    -

    Maintenance & Repair

  • Ford F150 will not start 3 Answers

    2010 F150 FX4 (5.4L) - starter cranks, but engine does not start. starter runs on for a few seconds after key turned. any ideas why?

    2010 Ford F-150 FX4 SuperCrew 4WD

    -

    Maintenance & Repair

  • My 93 Ford F150 will not start when cold 2 Answers

    If I give my truck engine a shot of starter fluid it will start but runs bad and the check engine light stays on. It runs this way for four mins. Then the light goes out and the engine smoothes out a...

    1993 Ford F-150

    -

    Maintenance & Repair

F-150

Looking for a Used F-150 in your area?

CarGurus has 13,933 nationwide F-150 listings starting at $1,712.

Postal Code:

Shortcuts

Search Ford F-150 Questions

CarGurus Experts

  • #1
    OJ
    Reputation
    42,600
  • #2
    Gene Arnett
    Reputation
    16,040
  • #3
    Rowefast
    Reputation
    15,890
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used GMC Sierra 1500
128 Great Deals out of 6,516 listings starting at $3,975
Used Ford F-250
4 listings
Used Ford Mustang
58 Great Deals out of 1,366 listings starting at $4,995
Used Ford Ranger
26 Great Deals out of 1,602 listings starting at $3,995
Used Ford Bronco
22 Great Deals out of 1,281 listings starting at $37,000

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.