2001 Ford F-150 BANK 1 AND BANK 2 LEAN

2001 FORD F-150
140,000 MILES • 4.2L • 6 CYL • 2WD • AUTOMATIC
Avatar
TAZEME
  • MEMBER
  • 2 POSTS
I have a 2001 Ford f150 V6 4.2. I have bolt P0171 or P0174 Lean Code , cleaned the fuel injectors, new MAF, and new manifold gaskets, still no help. Any thoughts?
Feb 13, 2014 at 3:45 AM
Avatar
HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check fuel pressure with a gauge probably low auto parts rent them.
Feb 13, 2014 at 3:57 AM
Avatar
TAZEME
  • MEMBER
  • 2 POSTS
Fuel pressure is right where it needs to be. Maybe when I put in a new fuel filter some air got in the line and gave it the code again??
Feb 16, 2014 at 6:54 AM
Avatar
HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
no that wouldn't happen with the air here are a few tips from tips page that
other shops have found an d may be your cause.
. Replace the isolator bolts holding the middle intake down. Just had the same truck and condition. Can see with the scannner showing upstream O2 pid, spray carb cleaner at lower to middle intake, and watch pid go to rich. Good Luck! Bolts $6.00 each at ford.
Either the 90 degree elbow for the P.S. pcv hose (under the throttle body kinda hard to get to but you still can) or lower intake gaskets. Fel pro sells an updated kit for this. also check this pcv elbow for sure as well as any grommet for holes in them as that wil do the same thing.
Feb 16, 2014 at 7:30 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle