4x4 vacuum regulator - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 4 Old 11-09-2012, 03:33 PM Thread Starter
Powerstroke.org Rookie
Join Date: Jul 2011
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
4x4 vacuum regulator

where is the 4x4 vacuum regulator located on a 05' 6.0L powerstroke? my 4x4 wont engage
ben_KingRanch is offline  
post #2 of 4 Old 11-09-2012, 09:50 PM
Premium Member
Term3's Avatar
Join Date: Feb 2011
Location: Edmonton, Alberta Canada
Posts: 3,957
Thanks: 0
Thanked 34 Times in 32 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 1 reviews
The vacuum pump is on top of the passenger side wheel well directly behind the vacuum canister. If your heater only blows out the window defrost then you have a vacuum leak on one of the hoses going to the hubs.

SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
Term3 is offline  
post #3 of 4 Old 11-10-2012, 02:58 AM
Powerstroke.org Rookie
Join Date: Jul 2012
Posts: 29
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
If the heat goes to defrost when u engage the 4x4 it might not mean u have a leak in one of the vacuum hub lines. My solenoid was bad causing the defroster issue pull the vacuum line coming out of the solenoid and plug it. If the heat goes to defrost the solenoid is bad. If the heat stays put u have a leaking line.
drewmeister13 is offline  
post #4 of 4 Old 11-10-2012, 12:58 PM
ZMANN's Avatar
Join Date: Feb 2008
Posts: 16,701
Thanks: 762
Thanked 830 Times in 799 Posts
Mentioned: 94 Post(s)
Quoted: 1019 Post(s)
Feedback Score: 0 reviews
The ESOF valve is next to the pass battery on the fender

if the heat doesn't or does go to defrost doesn't determine if the valve is bad

the ESOF valve will send a vac signal for under thirty seconds and stop ( commanded by the PCM ) this is used to engage disengage the hubs ( different duration and different HG )

so you can have a bad ESOF solenoid that just doesn't open ,, this will not cause a defrost issue

you can have a leaky ESOF that will cause an ESOF issue

a bad hub seal or line will cause a defrost issue ,, the combination of any of those is possible also ,,

easy enough to trouble shoot

Please donate to DTR Ron's Memorial
We Miss you Ronnie
ZMANN is offline  

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may 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