i have a 1991 ford f150 4.9 5 speed

Asked by May 13, 2014 at 09:25 PM about the Ford F-150

Question type: Maintenance & Repair

the fuel pump stays on for a long period of time before start and at steady or low rpms it
sputters but you can throttle thru and runs fine. after driving for long period high idle.
have replaced every electric component, wires , plugs, cap, rotor, o2 censor, you name
it I have replaced it. what next

3 Answers

Check out: http://blog.chiltondiy.com/2012/05/how-to-tell-if-your-fuel- pump-needs-replacing/ I am a newbie at this & ever problem is seeming like a feul pump problem... That's what yours sound like to me. That website is a great troubleshooting guide

85

Might be fuel pressure regulator, Just because you say the pump runs to long, the regulator does so by creating a back pressure since it is located at the beginning of the fuel return line. usually! could also be a leak in your lines.the other thing to check is vacuum lines fuel pressure reg. is controlled by vacuum so a leak in the vacume lines could also affect this

85

I forgot the other obvious one is fuel filter, has that been changed?

Your Answer

Add photo

Related Questions

F-150

Looking for a Used F-150 in your area?

CarGurus has 205,088 nationwide F-150 listings starting at $1,779.

ZIP:

Search Ford F-150 Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Ford F-150 Experts

#1 OJ
OJ
Reputation 6,650
#2 dandyoun
dandyoun
Reputation 4,120
#3 tennisshoes
tennisshoes
Reputation 2,470
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,741 Great Deals out of 149,178 listings starting at $1,500
Used GMC Sierra 1500
1,055 Great Deals out of 58,726 listings starting at $1,599
Used Dodge Ram 1500
528 Great Deals out of 13,261 listings starting at $1,800
Used Ford F-250 Super Duty
476 Great Deals out of 41,916 listings starting at $1,999
Used Toyota Tundra
640 Great Deals out of 27,761 listings starting at $3,200
Used Toyota Tacoma
710 Great Deals out of 32,122 listings starting at $2,000
Used Ram 1500
1,378 Great Deals out of 113,582 listings starting at $6,995
Used Ford F-250
586 listings starting at $1,357
Used Ford Mustang
583 Great Deals out of 41,215 listings starting at $1,699
Used Chevrolet Tahoe
852 Great Deals out of 28,369 listings starting at $1,700
Used Nissan Titan
244 Great Deals out of 15,281 listings starting at $3,999
Used Ford Explorer
1,204 Great Deals out of 71,146 listings starting at $1,000
Used Ford Ranger
228 Great Deals out of 7,053 listings starting at $1,200
Used Chevrolet Colorado
321 Great Deals out of 17,604 listings starting at $2,250
Used Ford F-350 Super Duty
490 Great Deals out of 25,898 listings starting at $2,999