If you happen to have a full exhaust you can hook up on a dyno with a good A/F reader and see whats going om at the time of the surgeing, but you probably have a short "dump" off the turbo even if you have a O2 sensor or you stick the dynos sensor in the pipe it is not going to read correctly except may at WOT, because the opening of the pipe is so close to where the sniffer get its sample it thinks the systems lean when its not this is mostly a problem at lower eng speeds making it tough to get a good map, with a minimal amount of drivability problems (surgeing) or hesitation, good dyno operators that have there shit together can still get one mapped good but they know what to do, adjusting the map numbers to get good drivability and killer power, I have spent weeks making small map adjustments riding for a couple days then trying another adjustment now this is nothing big just a couple number here or there to get the minor stumble, surge, lean spot, rich spot or whatever straitened up