200 SER,
What does that mean "your timing was off", i'd say check it yourself and bump it yourself. I asked the dealer to do it one time before i took it upon myself to do it and they totally wacked it out, it was at 5 degrees or something ridiculous and i could barely even peel out from a big rev launch. It really affects your car, grab the procedures off the NET and you'll eliminate the bog on throttle tip in if you bump to 17 or 18.
Basically unplug your tps, hit it with a timing light, adjust as needed, rev past 3K three times, shut off car, re-plug tps start and enjoy the POWER....
gpser96