i have an 88 f150 5.0 new high and low pressure fuel pump it doesnt like to start it cranks and cranks then finally starts it runs great after it starts i think im loseing fuel pressure when the motor

Asked by Aug 25, 2013 at 12:41 AM about the Ford F-150

Question type: Maintenance & Repair

it cranks a lot before starts I think im loseing fuel pressure when motor is off I just don't know where please help

1 Answer

25,575

Fuel pressure regulator? Fuel Filter? Leaking injector? You all ready hit the 2 most common. It's possible that you have a fuel injector that's leaking down or not sealing well and not know it. The 5.0L EEC-IV injection system on that truck is non-sequential. In other words, instead of firing the individual injectors as needed, it fires 2 on each bank simultaneously (4 then 4). So if one injector messes up, it will be difficult to tell. Ypu would need some way of isolating and pressurizing the fuel rail to watch a pressure drop. A trick you can try: After a cold soak, cycle the key on for 3 seconds then off. do it a couple of times and then try to start it. The fuel pump(s) will run for 3 seconds without a signal that the engine is running. This trick works great to prime one that has run out of gas too!

Your Answer

Ford F-150 Experts

  • #1
    OJ
    Reputation
    8,910
  • #2
    dandyoun
    Reputation
    4,540
  • #3
    tennisshoes
    Reputation
    3,060
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,145 Great Deals out of 167,073 listings starting at $1,498
Used GMC Sierra 1500
886 Great Deals out of 65,336 listings starting at $1,995
Used Ford F-250 Super Duty
374 Great Deals out of 44,451 listings starting at $2,400
Used Dodge Ram 1500
393 Great Deals out of 10,914 listings starting at $1,500
Used Toyota Tundra
490 Great Deals out of 32,176 listings starting at $1,999
Used Toyota Tacoma
608 Great Deals out of 42,670 listings starting at $1,500
Used Ram 1500
998 Great Deals out of 111,608 listings starting at $6,499
Used Ford Mustang
710 Great Deals out of 38,301 listings starting at $895
Used Ford F-250
471 listings starting at $6,694
Used Nissan Titan
214 Great Deals out of 19,787 listings starting at $3,495
Used Chevrolet Colorado
276 Great Deals out of 31,341 listings starting at $1,995
Used Ford F-350 Super Duty
328 Great Deals out of 23,972 listings starting at $2,488
Used Chevrolet Silverado 2500HD
325 Great Deals out of 29,082 listings starting at $2,995
Used Chevrolet Tahoe
664 Great Deals out of 39,394 listings starting at $1,000
Used Ford Explorer
824 Great Deals out of 63,128 listings starting at $1,000

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.