Originally posted by jockjets
Add to all of this the ECU threshold being set too high, and the voltage dipping into the ECU LO area, and all sorts of things can happen.
The ECU battery is really only hammered during the start sequence. After that it runs the pump and the electronics which take very little out of it. The ECU threshold can then be set at a sensible setting which will allow the starter to operate without pulling the volts down too far.
How can you modify the function of the starter to draw less current ? As far as I know, this starter hammers on full go whereas other ECU's have PWM on the starter and bring the motor up to starting speed slowly ?