and you have to tilt the stem of it a bit too to get it to slide in or out, it has alot of resistance to it, almost like its jammed, but its not, you really have to push/pull it like you mean it, dont play around
you have to set it to a certain distance before putting it back in BTW
i forgot the measurement now i tihnk it was like an inch and 3/8 i believe, id have to go look it up
clean out the hole in the TB unit with carb and choke cleaner and blast it out with compressed air,. before putting the valve back in
and dont go crazy tightening it up i have busted one clean off in the TB unit by overtightening its not hard to get carried away with the wrench/socket and snap it off :O i did that one on an s--10 blazr with 4.3 in it and so i had to snag the one off this 84 sunbird 1.8 or 2.0 convertible coupe we had out back for junk(blew the engine up in it)
it worked, the 4.3 ran fine with it lol
good luck