The only issue I'm having with emulation at the moment is switching the 10k (inner switch) after connecting to the AUP1. I have read a lot post on here that say to have the inner switch in the 10k position to start the ECM and tuner Pro/ laptop communicating. Then once they are communicating to switch it to the other position to take it out of "diagnostic mode". Whenever I switch it out of the 10k mode it will stop data logging and there is a noticeable change in the spark timing. I don't get to mess with it too often and the timing is now my biggest problem. I can get it running really well but as soon as I disconnect the cable for data logging it changes my spark timing.