hi idle problem

[lrssms]

I have a high idle problem with my 2000 venture extend van; Here is some history:
Van has had the problem with the bucking transmission. Shut the vehicle off, and then it acts fine. I know I need to have the transmission modules replaced. However, this problem has stopped for some time.
Now the vehicle idle increases to 3k or higher. I noticed that most of the time it will idle normal when I start it, but will increase in idle when I shift into gear.
I’ve shot W2 along the hoses to find a vacuum leak, but found nothing.
Repair History: I did the lower intake manifold gasket myself last year and replace plugs & wires, water pump, injector o-rings, and a few other things. I’ve had the dealer replace the IAC two times.
Because the high idle occurs when I shift it into gear, could it be the modules on the transmission?
Any other thoughts?

[toni1595]

Just a thought, do you have a "Service Engine Soon" light on?

I would tend to think that the trouble is coming from your transmission, based on your comments.

Toni.

[lrssms]

No Check engine light. I'm going to try to replace the PCV valve from the dealer - this is cheap first step. Going to get it from the dealer.