99 f150 triton v8 hard to start slow response to acceleration

Asked by Jul 05, 2017 at 02:16 PM about the 1999 Ford F-150

Question type: General

99 f150 with triton v8 very hard to start . Once it
finally does start it has a very slow response to
acceleration and it is fairly weak for a v8. Has the
k&n air filter.  I just replaced the mass airflow
sensor thinking that was the problem but it didn't
help. I'm thinking dirty injectors, or the throttle
position sensor . Has anyone else been through
this ? Any suggestions?

2 Answers

885

Could be a few things. I used to have this same car and when mine did this, it was a weak fuel pump. It met spec at koeo (key on engine off) and at idle, but going up hills with the gauge hooked up showed pressure loss. I would check fuel pump next and check resistance on injectors.

885

O-rings become worn in pump and pressure is still produced, but not enough

Your Answer:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    10,790
  • #2
    dandyoun
    Reputation
    4,970
  • #3
    tennisshoes
    Reputation
    3,890
View All

Related Models For Sale

Used Chevrolet Silverado 1500
122 Great Deals out of 11,319 listings starting at $4,500
Used GMC Sierra 1500
80 Great Deals out of 11,043 listings starting at $4,499
Used Ford F-250 Super Duty
15 Great Deals out of 870 listings starting at $3,995
Used Toyota Tundra
27 Great Deals out of 1,546 listings starting at $5,488
Used Dodge Ram 1500
24 Great Deals out of 537 listings starting at $3,800
Used Toyota Tacoma
19 Great Deals out of 1,620 listings starting at $5,795
Used Ford Mustang
22 Great Deals out of 1,220 listings starting at $5,995
Used Ford F-250
1 listing
Used Ford F-350 Super Duty
20 Great Deals out of 1,419 listings starting at $5,000
Used Ford Explorer
22 Great Deals out of 1,812 listings starting at $4,490
Used Chevrolet Tahoe
16 Great Deals out of 884 listings starting at $6,999
Used Ford Ranger
12 Great Deals out of 272 listings starting at $2,995

Used Cars For Sale

2018 Ford F-150 For Sale
16 Great Deals out of 7,046 listings starting at $24,549
2017 Ford F-150 For Sale
6 Great Deals out of 520 listings starting at $369
2016 Ford F-150 For Sale
15 Great Deals out of 940 listings starting at $19,997
2015 Ford F-150 For Sale
13 Great Deals out of 571 listings starting at $19,900
2014 Ford F-150 For Sale
16 Great Deals out of 478 listings starting at $14,900

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.