Ignition/Tuner/ECM/Fuel InjectionNeed advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.
Try opening Datamaster. Select record CAN data under file. Select save. This will bring up the Data Recording Control panel. This has a test Com option, and a couple of other features that are easier to see than Mastertune. You can double click the upper right and a window with more options will pop up dealing with com port.
The Mon button between stop and start is for monitor. This will allow you to look at data without recording any.