If Race Engineer was running during your session but no telemetry data was recorded, there are a few things to check.
Was telemetry connected?
Check that the telemetry status indicator in GO Fast showed "Connected" during your session. If it showed "Disconnected" or "Waiting for Session", the connection was not established. See Game-Specific Telemetry Notes for setup requirements for your sim.
Check your sim setup
For ACC, make sure you have the correct game install path configured and that ACC was closed during the first GO Fast launch. For iRacing, you need to press ALT+L to start telemetry output, or automate it as described in Setting Up Telemetry. For LMU, check that the telemetry plugin is installed. See Race Engineer Is Not Detecting My LMU Sessions if needed.
Did the session complete?
Telemetry data is saved when a session ends normally. If the game crashed or you force-closed it, the session data may not have been written. Try running a short clean session to confirm data recording works.
Need help?
If you are still experiencing issues, check the Troubleshooting section for common solutions. If you cannot find what you are looking for, open a support ticket and our team will help you out.