ChinaRiders Forums - View Single Post - Working With Diagnostic Data Cable & Software

pyoungbl · 05-07-2016, 08:19 PM

[QUOTE=katflap;215367]part2,

(apparently wen an O2 sensor fails it will leave your engine running rich)

Not necessarily. When the sensor fails the engine should revert to open loop, where this a base map telling the injectors to fire. The base map is still modified by input from various sensors. If the base map is rich across the board, then you will have a rich running engine. It is fairly common to disable the O2 sensor input and rely just on the base map...after that base map has been modified. REXXER dealers do this for Marelli ECUs and maybe others. In most cases the modification is done while the bike is on a dyno. The drawback is that dyno runs are done under ideal conditions, not real world. If one can do real time data logging and then map modification you would have the best of all worlds. My Stelvio has a real time data logged map, O2 sensors disabled, and runs great.

05-07-2016, 08:19 PM	#111
pyoungbl Join Date: Feb 2016 Location: Portsmouth, Virginia, USA Posts: 632	[QUOTE=katflap;215367]part2, (apparently wen an O2 sensor fails it will leave your engine running rich) Not necessarily. When the sensor fails the engine should revert to open loop, where this a base map telling the injectors to fire. The base map is still modified by input from various sensors. If the base map is rich across the board, then you will have a rich running engine. It is fairly common to disable the O2 sensor input and rely just on the base map...after that base map has been modified. REXXER dealers do this for Marelli ECUs and maybe others. In most cases the modification is done while the bike is on a dyno. The drawback is that dyno runs are done under ideal conditions, not real world. If one can do real time data logging and then map modification you would have the best of all worlds. My Stelvio has a real time data logged map, O2 sensors disabled, and runs great.
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