unwanted throttle blip on decelerating

Originally Posted by SurfDog

I have an uprev tune done at zcargarage in San Jose but am about to re-tune for high altitude driving in Colorado.

two questions (one easy one harder)

1. Do I need to retune from my present settings at warm sea level, to cooler and much altitude higher driving??? (between work at 5,500 feet and my home at 9,000 feet). I feel like the computer will adjust, but really do not know.

I could easily replace the Valet map(#3) or stock map(#2) for a mountain map.

2. I have experienced numerous occurrences of the following: While decelerating in a right fairly aggressive downhill turn (engine braking), about two seconds after the downshift (with and without SRM) I get a little "throttle blip" and lose some of my engine braking. Could this be a VDC function? It is really annoying, and (as I am usually counting on the engine decel) has me hopping on my brakes (which is inelegant and maybe a tiny bit unsafe as it always catches me by surprise)

3. (bonus question) Anybody have a good denver area tuner they can recommend??