I know this post is long dead, but I just did this today on my '11 Koup SX and let me tell you it's like learning how to left foot brake again regarding the sensitivity. I did it like some of the other guys suggested and adjusted it while the car was running to be able to fine tune it. Also, it did throw a CEL but with the learning ECU, I am sure that it will go off in the next couple of days. Now just to run it hard so it gets used to that. If anyone has any questions, just let me know. Best!