08-18-2022, 03:16 AM
Hi Enzo, in addition to Powerdubs explanation i disconnected my o2 sensor because;
As mentioned at low loads and steady riding the engine would subtly " switch " the fuel mixture between rich and lean.
The type of oxygen sensor in our cb1100's is a narrow band sensor which means when warmed up the output voltage changes from just below 14.7:1 air/fuel ratio ( google ) to just above ( leaner, more than 14.7 air mixture ) this is an optimum combustion or "stoichiometric" exhaust gas value, it changes from 0.2 volts below 14.7:1 to 0.8 volts above 14.7:1 air/fuel mixture fairly quickly ( narrow band ).
The change in voltage output ( i measured this by having a small voltmeter on the handlebars connected to the o2 sensor ) changes the fuel mixture, this happens quite abrubt on my 2010 cb and resulted in a "surging " ride; the bike responded by subtly speeding up and slowing down on a constant basis.
Initially i did not notice it much but after some steady rides it became annoying so i followed Ferret's advice and connected a 330 ohm resistor "o2 eliminator " in place of the o2 heater element ( this stopped the orange cel light from complaining )
The ecu monitors the current through the o2 sensor heating element and sets a fault code when the o2 heating element does not draw current.
As Houtman has experienced this strategy has changed in some newer models so another method has been/needs to be found to "eliminate" the o2 sensor's influence on the air/fuel mixture control in our ecu.
To my knowledge it has no effect on the ride or performance of the bike that i have noticed other than it stopped the engine's slightly erratic behavior on steady rides.
As mentioned at low loads and steady riding the engine would subtly " switch " the fuel mixture between rich and lean.
The type of oxygen sensor in our cb1100's is a narrow band sensor which means when warmed up the output voltage changes from just below 14.7:1 air/fuel ratio ( google ) to just above ( leaner, more than 14.7 air mixture ) this is an optimum combustion or "stoichiometric" exhaust gas value, it changes from 0.2 volts below 14.7:1 to 0.8 volts above 14.7:1 air/fuel mixture fairly quickly ( narrow band ).
The change in voltage output ( i measured this by having a small voltmeter on the handlebars connected to the o2 sensor ) changes the fuel mixture, this happens quite abrubt on my 2010 cb and resulted in a "surging " ride; the bike responded by subtly speeding up and slowing down on a constant basis.
Initially i did not notice it much but after some steady rides it became annoying so i followed Ferret's advice and connected a 330 ohm resistor "o2 eliminator " in place of the o2 heater element ( this stopped the orange cel light from complaining )
The ecu monitors the current through the o2 sensor heating element and sets a fault code when the o2 heating element does not draw current.
As Houtman has experienced this strategy has changed in some newer models so another method has been/needs to be found to "eliminate" the o2 sensor's influence on the air/fuel mixture control in our ecu.
To my knowledge it has no effect on the ride or performance of the bike that i have noticed other than it stopped the engine's slightly erratic behavior on steady rides.