Notices
1997 - 2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion

Check engine

Thread Tools
 
Search this Thread
 
Old Oct 14, 2020 | 07:26 PM
  #1  
Mr. Rogers's Avatar
Mr. Rogers
Thread Starter
|
5th Wheeling
Joined: Dec 2017
Posts: 44
Likes: 0
Check engine

Shows lean. Every time this happens I cleans the mas sensor and it’s good for about 4-6 tanks. Thinking it might be time to change it. Thoughts? Texas has has a lot of ethanol.
 
Reply
Old Oct 14, 2020 | 11:13 PM
  #2  
Spaznaut's Avatar
Spaznaut
Fleet Mechanic
Joined: Aug 2004
Posts: 1,276
Likes: 7
From: NE Tennessee
What is the actual code? Both banks lean? Just one bank lean?
 
Reply
Old Oct 15, 2020 | 07:22 AM
  #3  
projectSHO89's Avatar
projectSHO89
Hotshot
20 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
Almost everybody has lots of ethanol. It isn't your problem.

Provide explicit details like codes (as mentioned) and your vehicle specifics. We ain't psychic.

 
Reply
Old Oct 15, 2020 | 09:22 AM
  #4  
alloro's Avatar
alloro
Fleet Owner
15 Year Member
Shutterbug
Liked
Loved
Joined: Apr 2008
Posts: 24,322
Likes: 5,132
From: 0,0,1
Club FTE Gold Member
Originally Posted by Mr. Rogers
Shows lean. Every time this happens I cleans the mas sensor and it’s good for about 4-6 tanks. Thinking it might be time to change it. Thoughts? Texas has has a lot of ethanol.
Lean conditions can also be caused by a vacuum leak.
 
Reply
Old Oct 15, 2020 | 06:29 PM
  #5  
Mr. Rogers's Avatar
Mr. Rogers
Thread Starter
|
5th Wheeling
Joined: Dec 2017
Posts: 44
Likes: 0
Lean

98 navigator both banks lean. Sorry for lack of information. I work a lot
 
Reply
Old Oct 16, 2020 | 10:56 AM
  #6  
alloro's Avatar
alloro
Fleet Owner
15 Year Member
Shutterbug
Liked
Loved
Joined: Apr 2008
Posts: 24,322
Likes: 5,132
From: 0,0,1
Club FTE Gold Member
Originally Posted by Mr. Rogers
98 navigator both banks lean. Sorry for lack of information. I work a lot
That's okay, you're still welcome in "The Neighborhood."
At the back of the upper intake there is a rubber elbow that supplies vacuum to the PCV system. This elbow is a known issue for cracking and causing a vacuum leak.
 
Reply
Old Oct 16, 2020 | 02:18 PM
  #7  
Mr. Rogers's Avatar
Mr. Rogers
Thread Starter
|
5th Wheeling
Joined: Dec 2017
Posts: 44
Likes: 0
Thanks

I’ll just change it as well. I’ve changed out most of the rubber now.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Mauro Martinez
2009 - 2014 F150
8
May 2, 2020 07:04 PM
ocala562
1997 - 2003 F150
12
Jan 20, 2011 05:10 PM
blieux1
1997 - 2003 F150
1
Feb 24, 2007 11:14 AM
Petrol
Modular V8 (4.6L, 5.4L)
1
Jan 10, 2003 06:23 PM




All times are GMT -5. The time now is 10:50 AM.

story-0
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-1
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-2
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-3
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-4
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-5
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-6
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-7
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-8
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-9
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE