Wecome to the forum. There have been PLENTY of posts/solutions on this very topic. Use the "search" feature with keywords like, "idle", "190E", "16V".
Hope this helps.
* 1986 2.3-16V
* Pearl Black
17" chrome AMG rims (soon to be 16" AMG monoblocks with Pearl Black faces and polished lips)
* Euro headlights/clear corners/smoked taillights
* K&N air filter