Dying 05 Expedition - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Expedition Forum | Lincoln Navigator Forum Forum for discussion of the Ford Expedition and Lincoln Navigator.

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 12-14-11, 11:14 AM Thread Starter
Registered User
Join Date: Dec 2011
Posts: 1
Dying 05 Expedition

My 05 Expedition has selectable transfer case and when in 4wd auto mode it often dies. Sometimes when it kicks into 4wd it cuts engine power to nothing or dies and causes the antilock brakes to malfunction. The brake pedal gets soft and damn near hits the floor, locking the brakes up.

I also have the automatic A/C controls that randomly switch to defrost under acceleration regardless of what setting you have the vent control on. When you let off the accelerator it switches back.

05eddiebauer is offline  
Sponsored Links
post #2 of 4 (permalink) Old 12-14-11, 01:33 PM
Registered User
Join Date: Oct 2009
Location: Mililani, Hawai'i
Posts: 15
Re: Dying 05 Expedition

Sounds like all the traditional signs of a vacuum leak.
Eddie Bauer is offline  
post #3 of 4 (permalink) Old 12-14-11, 02:46 PM
2002 F150 XLT
Bert's Avatar
Join Date: Nov 2008
Location: Oregon
Posts: 10,298
Re: Dying 05 Expedition

Times 2^

Bert is offline  
post #4 of 4 (permalink) Old 01-03-12, 07:20 PM
360ci's Avatar
Join Date: Nov 2007
Location: Waterloo
Posts: 2,481
Re: Dying 05 Expedition

x3 on Vac leak.

The TCCM (transfer case control module) might also be to blame here for the 4wd system. It's vac controlled but if the circuit inside gets wet or even moist for a prolonged period of time it can cause issues such as not being able to get it out of 4wd and may not be directly connected to low vac pressure.

Also, check/replace the PCV valve, it's about $6 and takes a few minutes to change out. There's no easy way to find a vac leak, and just hope that it's not leaking behind the dash....

'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!
360ci is offline  
Sponsored Links

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Trucks | Utes | Vans |SUVs | Crossovers > Ford Expedition Forum | Lincoln Navigator Forum
Gear in this thread - Powered by O'Reilly Auto Parts

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome