i have 91 F 150 4.9 ENGINE . It will crank and run fine then just goes dead . If i switch tanks it will crank back up and run fine , then you drive for a while and it goes dead again .

Asked by Jun 24, 2015 at 09:41 AM about the 1991 Ford F-150 XL 4WD LB

Question type: Maintenance & Repair

if i'm running the front tank it runs fine for a while , then dies . i switch to the rear tank , it runs fine for a while then dies . i switch back to the front tank and it cranks back up and runs fine . It repeats this process ,

1 Answer

22,110

It sounds like you may have two bad fuel pumps. But what is the chance of that? If you can force it to malfunction in the driveway immediately run a fuel pressure check on the offending tank, then the other. It's going to be a process of elimination in a no run condition.

Your Answer

Ford F-150 Experts

  • #1
    OJ
    Reputation
    9,980
  • #2
    dandyoun
    Reputation
    4,690
  • #3
    tennisshoes
    Reputation
    3,450
View All

Related Models For Sale

Used GMC Sierra 1500
1,100 Great Deals out of 61,833 listings starting at $1,295
Used Ford Mustang
348 Great Deals out of 41,846 listings starting at $1,488
Used Ford Explorer
1,075 Great Deals out of 67,913 listings starting at $1,200
Used Ford F-250
426 listings starting at $2,500

Used Cars For Sale

2018 Ford F-150 For Sale
12 Great Deals out of 144,064 listings starting at $19,455
2017 Ford F-150 For Sale
229 Great Deals out of 13,835 listings starting at $18,450
2016 Ford F-150 For Sale
206 Great Deals out of 7,821 listings starting at $16,998
2015 Ford F-150 For Sale
434 Great Deals out of 10,814 listings starting at $11,990
2014 Ford F-150 For Sale
665 Great Deals out of 14,217 listings starting at $7,000

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.