KTuner.com

After installing a Ktuner V2 and flashing my 2013 Acura TL with base tune 4 and an increased rev limit to 7300, I experienced an issue. Despite having all the appropriate modifications for the base tune 4, my car would not go past 5000 RPM and multiple warning lights illuminated on the dashboard. Additionally, when attempting to turn off the car using the push button, it wouldn't shut down until I disconnected the Ktuner from the OBD port. Once disconnected, the car returned to normal. I'm unsure if I made a mistake during the process or if the ECU is reacting to the changes. Could you provide any insights into this situation?

Having the KTuner unit plugged in and operational can't affect the vehicle's operation. If you didn't see live data you may not have had it plugged in properly. Otherwise look for other issues.