Stop in for a cup of coffee

toolmanmike said
Another thing I would like to try b/4 I put a IAC on, I want to start it with the 4wd engaged. I think the actuator leaks vacuum and it idles a bit slower and more rough when in 4 wheel. If it starts and doesn't idle, shift out of 4 wheel and try again. A good size vacuum leak might overcome the slow idle/cold and the IAC can't compensate. It might save me $40 and a unnecessary part. I haven't had the issue until I started using the 4 wheel drive a couple weeks ago. Just thinking out loud.

Well I let it set and cool off and it acted up again when I started it but the ac/defrost was on and the 4wd was engaged. I took the big scanner out and checked, no codes, Did a IAC test and a TPS test. Both of those looked good so I was able to reset both and I will see how it acts in a few hours of cool down.