I would think that the idle would affect it IF it is controlled by the APPS (manual hi idle whereas the high idle is possible by physical pressure on the APPS). If it is electronically controlled, then I don't think so.
My truck does run smoother since I did it....

 

So what does y'alls truck idle at normally

 

The 5 spd does have a different idle spped than the auto I think.
My auto idles at 820-830.

 

I with ya Marine I was thinking it would be electronically controlled but, like I said not sure I pulled my work trailer today with the torque tune and wow what a difference. I can turn it clear up and actually drive it. Before I was able to use setting #3 half way decent but now its run what ya want Turbo does seem to spool a lot faster but why? I mean I can spool this in a hurry empty but not usually pulling my trailer

My auto Idles right at 800rpm

 

ok thanks fellas I am doing this tomorrow it is storming like crazy and I got my mud bogger burried up to the frame got a tractor coming to tow it out. Can't wait to do this

 

20-35 minute job

 

my 5spd idles bout 700-750 or so

 

Let us know how much it was out.

 

Where is the PICs?!?!

 

I noticed that my throttle has a little more response and my cruising EGT's are down a bit. I still get some surge when running the TQ Tune and I lug the truck.