So I was cleaning my FITV then when I was tightening the csp back on I snapped the small bolt, so I didn't have another at the time so I jb weld it put it back everything was fine when I turned on the car it went to 1800rpm no problems no idle play,

so finally my friend gave me his cause he wasn't using it (his was from a automatic, mine is manuel) I cleaned that one put it on now when I turn on the car it goes to 1500 rpms then slowly goes to 1800 rpms then slowly goes back down as the car heats up

my question is why is it different?

I looked inside the FITV and the metal piece that stick out of the plastic head is more round (my Manuel one) and the auto one is more pointy... Maybe that's why any help