Is this possible? EgQX56 used his powerpup about a month ago to do the 2 degree and I immediately noticed the fast throttle response. Lately, it doesn't feel the same and the throttle does not respond nearly as well as it did after the change. I have an '05 QX and EgQX56 has a '06 - would that matter? The only other thing we modified was the idle. Since the 2 degree, I have not had my QX serviced. Thanks in advance for your feedback.

The ECU adjusts to your driving habits. It's very noticeable at first then not so much later. If you remove it, it will feel like a slug. The same goes with tuning using a tuner. It's very noticeable at first then later you don't notice until you remove it and it feels like driving a V6. If you go test drive another one that is still stock, it will feel sluggish. Hope that helps. :D

pops is right. i put the armada back to stock tune , but i keep the 2 degree, when i go in for oil changes... i can tell just by how it cranks up! so when you do those radical tune shifts, you do tell a difference.. i do... but i agree with pops, you get used to it and the car adjusts...