![]() ![]() Then it will start Sniffing the O2 Sensors, and keep trimming the STFT's. Now in 'Open Loop' The MAF is used to calculate the Air Volume, and Baised upon the STFT and the LTFT, it will figure out a Fueling Solution for this 'Point in Time', and will keep repeating the Calculations ( Un Checked by the O2 Sensors ) till the Load Calculations will allow the ECU back into 'Closed Loop'. So ( I Surmise ) in Closed loop running, the only thing this will do is Change the Ignition Timing. The MAF is also used for the Engine Load Calculations, so the Ignition timing can be Pulled from 'A Map' somewhere. So if you 'Tweek' the MAF diring 'Closed Loop' the only thing that will hapen to the Fuel, is the Short Term Fuel Trims, will 'Reach' one way or the Other, to keep the Fueling at the '14.7 Swing' that the ECU does. I'll let you know when I'm ready for something you can test.Īlso, I'm moving this thread to the Development section.The MAF is used in the Inital Calculations of the Air entering the Engine, to be 'DoubleChecked' by the O2 Sensors a Few mS later. I guess if anyone is only interested in having just one set of tables switching, the stock AC switch would be easiest to use since it's already hardware wired into the ECU. I could look into adding a 4th input which would be the "AC Request" signal to enable another map switching table. Torque Reduction Request - Gear-Shift = Pin 82 ![]() Though they require custom wiring to send 5V to these pins using a toggle switch. ![]() ![]() These have been tested and working properly. Maybe switch between Gasoline and Ethanol? Though full Flex Fuel support is also planned so switching between straight Gas and Eth may not be that useful. Haven't come up with a good use case for the 3rd. Another can be coded later to use as a clutch signal to enable Flat-Foot-Shifting. This will be included in my custom code to let the user switch between boost maps on the fly using one of these. There are 3 on/off digital (not analog) signals related to ASC that we've been able to use to enable map switching. We have tested using 3 auxiliary inputs to enable map switching. ![]()
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January 2023
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