Bcf15

What should the vacuum line pressure be at the iwe on a 2006 f150 if the system is working properly . Can't find this information anywhere!

Dirttracker18

That's because it is unimportant. Essentially it should be the same as at engine vacuum.

What you need to know is:
1. Will both IWEs hold vacuum. Use a pump and leave it, should hold the pressure with no drop.
2. Test just below the solenoid, does the system hold pressure.

If both of these check out you are good in the system, save for the solenoid itself.

Bcf15

Wheel ends hold vacuum and I get about 23 inch pounds in the vacuum lines at the hub

corey_lax

If it holds pressure you are good in the lines. Whats the problem? IWE's stuck in locked mode? T-case won't engage?

techrep

iTrader: (1)

Vacuum varies.. engine idle produces the greatest amount of vacuum vice at 65 MPH

gmb13

The greatest vacuum is produced when you are coasting. If you are on the throttle the vacuum is lowest.

techrep

iTrader: (1)

Like I said !