Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software - Manual (Page 26)

BigStuff3 Pro SEFI System (LS1)
Version 1.0 25
Select another Com Port until an available port is identified. Once the PC identifies an available
Com Port, the following screen will appear.
Press the PC’s “Enter” key or left mouse click on Yes and the Com Port will resynchronize.
Next, double click the left mouse button on the BigComm short cut icon located on the Windows
desktop.
The BigComm software will attempt to establish a connection between the PC and the GEN3
ECU. The following screen will appear.
BigComm desktop icon