Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software - Manual (Page 85)

BigStuff3 Pro SEFI System
Version 2.1 – February 2011 78
TPS % 0 8 16 24 32 40 48 56
IAC 5 25 50 90 122 133 144 150
If the TPS is not adjustable, and the obelisk will not fit inside the first cell(s), input the values
in the example table shown below, into your Throttle Follower Table. These values represent a
good starting point. Some additional fine adjustments may be required.
TPS % 0 8 16 24 32 40 48 56
IAC 5 5 44 90 118 125 144 150
Next, from the main BigComm tool bar, go to “Idle” and then “Idle Spark” in the drop down. The
table below will open. Input the values shown below into your Idle Spark table.
In an effort to maintain a stable idle, the GEN3 ECU will:
 Add (advance) the timing values to the left of the zero RPM cell to the base spark map timing
values.
 Subtract (retard) the timing values to the right of zero RPM cell from the base spark map
timing values.
Since the timing values in the spark map are now approximately 10 degrees at idle, the Idle Spark
Table now has significant authority in maintaining idle stability, by introducing large (as a percent of
10 degrees of timing) timing values when the engine RPM decreases or increases.
Do not put negative values into the cells to the right zero RPM in the table. The ECU automatically
treats these as timing retard values.
Lastly, from the main BigComm tool bar go to Configuration/Operating Configuration/TPS. Make
sure the “Max TPS% for Idle” value is 2% to 3% above the TPS % at idle. For example, if the TPS %
that was set at idle is 2%, the value in this table should be 4% or 5%, otherwise there will be no Idle
Spark Control.