Vaccume leak?


Asked by Feb 21, 2017 at 02:50 PM about the 2001 Ford F-150 XLT 4WD SB

Question type: Maintenance & Repair

Hi I have a 2001 f150 5.4 triton xlt and I had
a bad coolant leak for a while and it also
threw a bank 1 running too lean code. I knew
the leak was from the intake gasket so i just
bought a whole new intake and all the new
gaskets. When I finished I cleared the codes
and not long after the code came back up
again "Bank 1 too lean". I can definately hear
some sort of hissing under the hood but I
have not been able to find a vaccume leak
using carb cleaner. I replaced the pcv valve 2
times so i know its not that. I dont notice
any performance issues at all with the truck
either. It runs strong and idles fine. It dosnt
seem to get any hotter than usual either. I
cleaned the MAF sensor also. The truck has
240,000 miles on it. Im just really stumped
and cant think of what it could be. Maybe a
bad MAF or O2 sensor?

1 Answer


Have the vehicle scanned for any trouble codes, and post them back hear. It may be as little as a bad fuel injector.

Your Answer

Ford F-150 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,175 Great Deals out of 151,474 listings starting at $1,995
Used GMC Sierra 1500
877 Great Deals out of 59,609 listings starting at $1,980
Used Ford F-250 Super Duty
370 Great Deals out of 44,780 listings starting at $1,600
Used Toyota Tundra
558 Great Deals out of 37,746 listings starting at $1,500
Used Dodge Ram 1500
336 Great Deals out of 9,586 listings starting at $800
Used Toyota Tacoma
427 Great Deals out of 42,057 listings starting at $2,600
Used Ford Mustang
274 Great Deals out of 38,355 listings starting at $1,995
Used Ford F-350 Super Duty
414 Great Deals out of 25,417 listings starting at $3,900
Used Chevrolet Silverado 2500HD
359 Great Deals out of 31,456 listings starting at $1,950
Used Ford Explorer
847 Great Deals out of 64,621 listings starting at $2,000
Used Chevrolet Tahoe
590 Great Deals out of 37,467 listings starting at $1,699

Used Cars For Sale

2018 Ford F-150 For Sale
42 Great Deals out of 140,782 listings starting at $19,500
2017 Ford F-150 For Sale
176 Great Deals out of 11,302 listings starting at $18,450
2016 Ford F-150 For Sale
192 Great Deals out of 8,257 listings starting at $14,500
2015 Ford F-150 For Sale
335 Great Deals out of 10,374 listings starting at $11,990
2014 Ford F-150 For Sale
530 Great Deals out of 12,861 listings starting at $8,991

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.