[Rmtt]

I just installed my 3SI, but used BPC's tune. I haven't had any issues.

How long have you had yours installed? I wouldn't think it would be a DISA issue, sounds more along the lines of a throttle position issue.

But I used new DISA valves when I did mine. Also have you contacted AA and asked if they've experienced anyone else with this issue.

I'm not sure what all is involved in any of the shelf tunes, but I would assume throttle position would be optimized as my throttle now reacts like the way my old E46 M3 does when you would use the Sport button.

Also I think I read something about AA recommending resetting adaptations when using the Simon tool to program the ECU.

With BPC, they said I didn't need to do any of that.