Hi, I got a 93 fd automatic that have an idle around 1,000rpm and it shake from time to time in the Park range however when i put it in the Drive range the rpm drop to about 800 and acts normal. So my question is, can a defective AWS cause it to idle that way? or there something more to it? As far as i know the car had a few vuccum hoses that is cut off and im in the process replace all of them. I also found a plug hose that coming from the tranmission that i dont know where it go. I'll try to post a picture of it.

 

Do anyone know where this hose go too?it look like its coming from the tranmission.

 

anyone?help plz?