Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software - Manual (Page 65)

BigStuff3 Pro SEFI System (LS1)
Version 1.0 64
The sequence of events the ECU steps through during an engine “start” are defined, in order, in
the next four sections as follows:
• Cranking
• After Start Delay
• After Start Correction (adding fuel)
• After Start Decay
35. Cranking (F1 – “Quick Key”)
The inputs in this table are only used by the ECU when the engine is in the cranking mode (<
400 RPM).
The Cranking table allows the user to input the actual pulse width the injectors will operate at
during engine cranking. The pulse width required is a function of the engine coolant
temperature. The colder the engine the larger the pulse width required.
If the throttle needs to be opened to start the engine during Cranking, the ECU is adding to
much fuel. Therefore, a smaller injector pulse width needs to be entered into the input cell
relative to the engine coolant temperature. Make sure pulse width modifications are inputted
into the correct input cells. Entering a smaller pulse width into the cell representing an engine
coolant temperature of 144
o
will not help start the engine when the temperature is 55
o
Note: If the throttle is opened to position greater than what was set in the Clear Flood TPS %
setting, the ECU will not add fuel. See
.
Clear_Flood_Setting for more details.