I have looked in the archives and I haven't come up with a clear explanation for why my car is doing this. When the car is cold and I turn it on it goes to 2700 rpms and then gradually as the car warms up goes to 1350 rpm and idles arounds there. But for a '87 TII it shouldn't have the cold start operation right? I have replaced all the vaccum hosing, air hoses, coolant hose, and the engine has just over 4500 miles on it. I recently replaced the wax idle thing, with a brand new one, and the BAC is turned to almost closed any ideas?
Thanks,
Sam

 

You most likely have an intake leak... you can use a garden hose or can of brake clean and spray around the throttle body and intake manifold... when the idle changes is the approximate location of the leak

 

Why wouldnt the TII have the AWS?