My buddie has a 2005 f150 xlt n wont go into 4 wheel. he knows nothing about cars or trucks. my buddie replaced the passenger hub (which didnt fix it n i told him that befor he wasted his money). so what do i replace the purge valve, the pcv hose or the 4 x4 actuator. if none of those then what. or if all of those thats cool too. just need this to work. (i came up with these by just reading online.) Thanks alot

 

IWE solenoid ...firewall behind the battery, double check the Vacuum lines going to each IWE.

 

https://www.f150forum.com/f72/how-di...m-esof-186872/