1996 Lincoln Town Car - 4.6L P0174 Lean Bank #2-Fixed

Specific repair issues for Ford cars & FWD vans
Post Reply
nokomisauto
25 Club: Starting Contributor
Posts: 28
Joined: Thu Sep 30, 2010 4:57 am

1996 Lincoln Town Car - 4.6L P0174 Lean Bank #2-Fixed

Post by nokomisauto »

We have 1996 Lincoln Town Car with 4.6 Engine.

Code p0174 both fuel trims at idle are moving 3+ to 3- on both banks. When driving, it jumps on both banks to 30 to 40+ trims. We check for vaccum leaks with propane and egr tube and clean mass air flow sensor; readings are in spec by ford specs. The o2 sensors are switching evenly on both side engine runs very good and no missing and good power.

Has anybody ran into this problem before?
User avatar
steven kiser
5K Holy Smokes Contributor
5K Holy Smokes Contributor
Posts: 6184
Joined: Fri Jul 06, 2007 4:58 am
Location: eastern ma.

Re: 1996 Lincoln Town Car - 4.6L Lean Bank #2

Post by steven kiser »

seen maf's cause it. ford maf's can be within specifications and still be bad.
never argue with a fool, they'll drag you down to their level and beat you with experience
User avatar
ricmorin
5K Holy Smokes Contributor
5K Holy Smokes Contributor
Posts: 5965
Joined: Mon Jul 25, 2005 10:11 am
Location: New Hampshire
Contact:

Re: 1996 Lincoln Town Car - 4.6L P0174 Lean Bank #2

Post by ricmorin »

Agreed. Sounds like a bad MAF.
Ric Morin - Volunteer Forum Moderator, Shop Owner, ASE Master L1
Motorcar Alternatives, LLC
603-622-6434 x203
www.motorcaralternatives.com

I find my life is a lot easier when I use Special Orders
User avatar
liljoe
1500 Club Master Plus Contributor
1500 Club Master Plus Contributor
Posts: 1636
Joined: Thu Sep 21, 2006 6:27 am
Location: Mentally: outer space. Physically: Alabama
Contact:

Re: 1996 Lincoln Town Car - 4.6L P0174 Lean Bank #2

Post by liljoe »

Check the MAF at WOT, take a snap shot on your scanner or have helper watch it. With a 4.6 when it is at 3500 RPM WOT, you should see around 129 grams of air flow per second. You will prob see a figure closer to 100 or less. this woud def indicate a bad MAF.

Easy MAF formula: engine RPM in thousnads ( 3500 = 3.5 ) times engine size ( 4.6 liters) times eight (8). This will tell you if it is working correctly. If your are way above sea level these numbers will be a bit lower.
THIS IS FOR NATURALLY ASPERATED ENGINES ONLY, NO TURBOs OR SUPERCHARGERs.
Working hard to prove the Green Team can do it with the best of 'em.
Always remember: AIN'T NO FREE LUNCHES!!
Am I the Only One?- I don't think I am.
The further a society retreats from the truth, the more it hates those who speak it. George Orwell.
nokomisauto
25 Club: Starting Contributor
Posts: 28
Joined: Thu Sep 30, 2010 4:57 am

Re: 1996 Lincoln Town Car - 4.6L P0174 Lean Bank #2

Post by nokomisauto »

The fix was the mass air flow sensor Thank You for your help. Ray
User avatar
steven kiser
5K Holy Smokes Contributor
5K Holy Smokes Contributor
Posts: 6184
Joined: Fri Jul 06, 2007 4:58 am
Location: eastern ma.

Re: 1996 Lincoln Town Car - 4.6L P0174 Lean Bank #2-Fixed

Post by steven kiser »

thanks for posting the fix. speaking for myself, it means a lot when someone closes a post.
never argue with a fool, they'll drag you down to their level and beat you with experience
Post Reply

Return to “Ford Cars”