ninjette.org - View Single Post - New Article: Power Commander PCV vs. Bazzaz Z-Fi vs. ECU Flash vs. aRacer Race ECU

DannoXYZ · June 10th, 2019, 06:39 PM

That's fuel-trims causing shift. ECU has pre-programmed maps and target AFR. Using a piggyback to "fool" the ECU by modifying MAP/TPS values tricks it into injecting more or less fuel only temporarily. That's because ECU will analyse O2-sensor feedback to see how mixture is burning. If measured AFR doesn't match what's programmed, ECU will adjust injector duty cycle up or down until it does match.

So it's best to re-program the actual ECU maps themselves.

June 10th, 2019, 06:39 PM	#4
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	That's fuel-trims causing shift. ECU has pre-programmed maps and target AFR. Using a piggyback to "fool" the ECU by modifying MAP/TPS values tricks it into injecting more or less fuel only temporarily. That's because ECU will analyse O2-sensor feedback to see how mixture is burning. If measured AFR doesn't match what's programmed, ECU will adjust injector duty cycle up or down until it does match. So it's best to re-program the actual ECU maps themselves.