4WD vacuum line '98 Ranger PUZZLED - Ford Truck Enthusiasts Forums



Ranger & B-Series All Ford Ranger and Mazda B-Series models

4WD vacuum line '98 Ranger PUZZLED

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 07-03-2013, 09:15 PM
gpdickert gpdickert is offline
New User
Thread Starter
 
Join Date: Jul 2013
Posts: 1
gpdickert is starting off with a positive reputation.
4WD vacuum line '98 Ranger PUZZLED

I noticed that one of my vacuum lines was bad on the driver's side. I've done a lot of reading on the 4WD systems and frankly I'm confused now. My understanding is that when in 2WD the solenoid is open pulling a vacuum on the actuators (IWE) which keeps them disengaged. When you switch to 4WD the shift motor on the transfer case sends power to the front wheels and the solenoid turns off the vacuum which engages the actuators sending power to the wheels. Therefore if there is a vacuum leak the actuators won't disengage properly.

Through my trouble shooting I've determined that I think the solenoid is working properly because I'm getting a vacuum when in 2WD and no vacuum in 4WD. I believe that both actuators are engaged and working properly when in 4WD. However, I must not be getting a vacuum to the driver's side actuator (hub) because the line is totally busted up and can't possibly hold a vacuum. However the passenger side line looks good to me. Does this mean that I've been driving around in "3WD"??? I don't seem to have any problems when in 2WD turning (no tire skip or hop). Can someone help me understand whats going on?
Reply With Quote
  #2  
Old 07-04-2013, 09:01 PM
Rockledge's Avatar
Rockledge Rockledge is online now
Post Fiend
 
Join Date: Jan 2003
Location: Connecticut
Posts: 9,662
Rockledge is a splendid one to beholdRockledge is a splendid one to beholdRockledge is a splendid one to beholdRockledge is a splendid one to beholdRockledge is a splendid one to beholdRockledge is a splendid one to beholdRockledge is a splendid one to behold
Vacuum to the hubs only occurs when switching INTO 4WD (for a period of 50 seconds or so) and OUTOF 4WD (15 seconds or so).

When switching into 4WD, after 50 seconds of "high vacuum" being applied, the hubs should be engaged. The problem is, there is no way for the system to actually confirm hub engagement. So the 50 seconds of high vacuum ends regardless of whether the hubs are actually engaged. If the hubs (or a single hub) do not engage, then that is usually indicative of a vacuum leak.

When switching from 4WD back to 2WD, after 15 seconds of "low vacuum" being applied, the hubs should be dis-engaged. Again, the problem is, there is no way for the system to actually confirm hub dis-engagement. So the 15 seconds of low vacuum ends regardless of whether the hubs are actually dis-engaged. If the hubs (or a single hub) do not dis-engage, then that too is usually indicative of a vacuum leak.

Hence, it's not all that uncommon for one side to work OK while the other side fails to engage/disengage properly, resulting in 3WD.

Check out Ranger Pulse Vacuum Hublock Diagnostics for more info.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Everything You Wanted To Know About The IWE System...And Then Some xjcamaro89 2004 - 2008 F150 418 09-30-2017 04:07 PM
How to Troubleshoot and Fix F150 4X4 1997-2003 revytrucks 1997 - 2003 F150 130 09-20-2017 11:07 AM
2004 FX4 Four Wheel Drive NOT WORKING!! Capt No Slack 2004 - 2008 F150 2 01-06-2017 07:58 PM
Leaving 4WD actuators in 4WD but diff free... Question! Schiben 2004 - 2008 F150 4 09-29-2014 06:58 AM
Front hubs not engaging- Actuator or more? guessrow 2004 - 2008 F150 2 10-10-2013 08:13 PM


Go Back   Ford Truck Enthusiasts Forums >

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 09:05 PM.