My Passenger door lock doesn't even budge when I hit the pwr door locks. My drivers side craps out occasionally. I have to manually unlock the passenger door. When I replaced the window motor I sprayed lithium on the lock(what I could see) and worked it but still is crappy. I haven't yet looked at the passenger side (I am dealing with it till I bought a component spkr set, and some dynamat wanted to take care of everything at once).

My passenger power lock is picky too. It will work fine for a couple of weeks straight, then it just stops. Then a couple more weeks later it works again. Motor wearing out maybe??

it is prolly a binding issue. don't spray just the lock but all the clips that hold the rods, etc....

and the actual slide in the door handle, too