Hey guys. 89 3.0 auto. I have a funky idle issue. When my car is cold (first morning start up) I have a funny "surging" idle issue. Happens more while in gear but it'll happen in park as well. I've been looking at receipts and this has been an issue since 1991. Car only has 65k. The issue goes away after a few minutes of driving. I've cleaned the iacv to no avail. I have no vacuum leaks or CEL and the air filter is clean. I am going to do a tune up and change the fuel filter and trans fluid and filter. This car is remarkably clean with no leaks at all. This idle doesn't affect driving it's just bothersome. What do you guys think? Thanks in advance.