Question 4x4

[IDSTROKER]

Ok I have tried everything replaced o ring's and checked all hoses. I have unhooked the main hose that feeds both hub's up by the silinoid valve and plug the end heater swithes from floor to defrost What are the chance's that the silinoid valve is bad. Any help would be good thanks

 

[KRISTOLSON]

so you have the hose plugged right after the solenoid valve? and you are still losing vacuum when you turn on the 4x4?

 

[KRISTOLSON]

Does the heater change from floor to defrost randomly? or only when swithing 4x4 on/off? If it only loses vacuum when you are switching the 4x4 on or off, I would be inclined to say that the solenoid switch is indeed working, and the leak would have to be after that point in the system. I was thinking, did you plug the line where they tee off to go to each hub? or was it above that? I would suspect that the leak is on the boot that comes out of the solenoid (the black hose), on the poly line right after that (the one that has like a wire loom over it) or on the joint where it turns into rubber line. If you plugged the line immediately after the solenoid, then you would want to check the valve itself, see if when it engages, if it is leaking e.g. crack in the valve body or some way for the vacuum to pull outside air at that point.

 

[IDSTROKER]

Ok on the solenoid we have a black and red line i hooked my vac pump up to the black line and pulled -15 wc i could hear the hub's lock in and it held it there for 15 min's.

 

[KRISTOLSON]

try putting your vac on the red side, plug the black side, pump it up, then cycle the switch, and see if your solenoid valve is leaking somewhere.

 

[IDSTROKER]

Ok i just hooked up my pump to the red side and pumped it up to -25 and pluged the black side. Turned the key on and stayed a -25 turned the switch 4x4 and lost all presure. Put back to 2x4 repumped and turned 4x4 on and lost all presure a gain.

 

[KRISTOLSON]

well I would say that is definitely a bad solenoid valve. It must be leaking vacuum right within the switch somewhere. I am not sure if there is a rebuild kit for the valve, or if you are stuck buying a new valve altogether.

 

[IDSTROKER]

That is what i thought thanks for all the help and the time u spent helping me .

 

[IDSTROKER]

Well installed new solenoid $ 67.12 and 4x4 works great..

 

[KRISTOLSON]

That is awesome. did you ever see exactly where/ how the old one was leaking? cracked housing, blown out packing etc?