I just replaced the front passenger side CV joint assembly in my 92 loyale. It was pretty bad, but it didn't have any issues going in or out of 4wd before I changed it, now that I have it won't switch into 4wd.

Welcome to the USMB

 

Questions about your loyale should actually be in the next forum down  "old Gen"  not the historic.

 

Mods can move.....

 

But your 4wd won't work because you disconnected the small vac line from the engine to the canister at the back corner/pass side of the engigne bay.

 

This vac line supplys the solenoids that do the shifting for 2wd/4wd.  Also it controls your blower modes......Right now I bet you only get heat from the dash?  Not defrost or foot vents (heat).