Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software - Manual (Page 125)

BigStuff3 Pro SEFI System
Version 2.1 – February 2011 117
to the “On” position. The ECU cannot be programmed and changes will not be saved with the ignition
switch is in the “Off” position.
The best way to detect that the calibration changes have been saved from RAM to the GEN3’s Flash
memory is to watch the green communication ball in the upper right corner of the BigComm software
screen. After the ignition switch is turned off, the green sliding ball will continue to move back and
forth for approximately fifteen (15) seconds. After approximately fifteen (15) seconds, the green ball
will momentarily stop, indicating that the ECU’s calibration RAM has been permanently saved to the
ECU’s Flash memory. DO NOT TURN THE IGNITION SWITCH ON OR CRANK THE
ENGINE WHILE THE CALIBRATION IS BEING SAVED!
Notes:
o The ECU stays alive for thirty (30) minutes after vehicle ignition is off to allow for DAI
uploads from the GEN3 ECU to a PC.
o The ECU cannot be programmed when the vehicle ignition is off.
o The Flash memory is only updated when calibrations changes are made.
Saving a Default Calibration
Once the ECU’s calibration RAM changes have been saved to the ECU’s Flash memory and you are
satisfied with the calibration, BigStuff strongly recommends that a “Default” calibration be saved to
the ECU to safeguard against system crashes. With the engine off (no engine rpm) and the vehicle
ignition in the “On” position, go to the main tool bar and left click on File as shown below. A drop
down screen will open. Left click on “Set Default Calibration”.
The following screen will open. Select “Yes” to save the default.
The following screen will open indicating that a delay (worst case 30 seconds, typically less than 2
seconds) is required to set the default calibration.
Set Default Calibration