Cleaned the TB last night and reinstalled my Tune. Drove to Atlanta to work today. Lots of stop and go traffic in Atlanta and everything is back to where it was when I first bought the Mustang and installed my CAI and Tune. Symptoms are gone. I removed the TB for cleaning. Only took 30 minutes to pull it, clean it and put it all back together

 

Here's a picture of the spacer I used. It's just some foam tape large enough to take up the first few mm's of slack in the drive-by-wire system. You will have better throttle response once you take up the slack.

WITHOUT bending the wipers.

 

these tb's seem to bad to gunk up. You may want to try a air/oil seperator to keep it from gunking up so quickly. Ford put a hyperactive PCV system on these engines and that oil gets all in your intake manifold.

 

I'm glad to hear it worked for you.

 

Well, I think I solved my problem. Brenspeed suggested that I try one of their other tunes, so I tried the 91 tune going to work today. But it still had the problem. When I got home, I cleaned the throttle body with TB cleaner. That seemed to help, but it still wasn't quite right. Now, I've been thinking that what might be going on is that the idle is too low and sometimes the engine is balking a little when I give it gas. Someone else in this thread or somewhere, can't remember, said that they had reset the idle higher. I checked, and the idle speed for drive (it has separate setting for idle speed in neutral) was 520. So I set it to 720. Now, I haven't driven it in traffic yet, but I drove it to the store, and it seemed to be much better. I didn't slam my wife's head against the headrest even once!