No, that won't make it run richer widening the voltage from lean to rich will just slow the "bounce" between lean/rich. What it will do is make the 02 reading less effective and subsequent ECU self adjusting much less effective.
The bounce that I refer to is how a narrow band is supposed to work reading constantly from lean to rich when the cells are just right it will evenly go back and forth and AFV will be dialed at 100%.
Here is a more in depth explanation:
"How does the O2 sensor measure the fuel mixture?
An Oxygen sensor is a chemical generator. It is constantly making a comparison between the Oxygen inside the exhaust system and air outside the engine. A Zirconium stabilized yttrium oxide ceramic shell is coated with a layer of platinum. When the nose is heated the platinum will begin to react with the exhaust gasses and a voltage potential will form between the inner and outer layers. The sensor does not begin to generate it's full output until it reaches about 600 degrees F. Prior to this time the sensor is not conductive. This voltage output of the sensor is usually between 0 and 1.1 volts. A rich mixture leave very little free oxygen and the reaction will send out a voltage greater than 0.45 volts. If the engine is running lean, all fuel is burned, and the extra oxygen leaves the cylinder and flows into the exhaust. In this case, the sensor voltage goes lower than 0.45 volts. Usually the output range seen seen is 0.2 to 0.7 volts. The mid point is about 0.45 volts. This is neither rich nor lean. A fully warm O2 sensor will not spend any time at 0.45 volts. The O2 sensor is constantly in a state of transition between high and low voltage. Manufacturers call this crossing of the 0.45 volt mark O2 cross counts. The higher the number of O2 cross counts, the better the sensor and other parts of the computer control system are working. It is important to remember that the O2 sensor is comparing the amount of oxygen inside and outside the engine. If the outside of the sensor should become blocked, or coated with oil, this comparison is not possible. Also if the exhaust side of the sensor has been contaminated by using leaded fuels or gasket sealers which are not specifically identified as being approved for use with oxygen sensors the sensor can be permanently damaged."
taken from here
http://www.buelletinboard.com/forums/archive/index.php/t-2665.html
Think about what the tuner has done like this:
If stock 02 values were two tennis players this would be on a regular court
If the tuners values are used the two tennis players are now standing twice as far from the net then they would before so the ball has to travel much further between the two players.
Does that make sense to you?
If you have tuned your closed loop with his values, you have most likely cheated the ECU's adjustment ability... and yes, I realize his values are closer to what was quoted BUT they both cross the .45, just one tighter than the other. I'm sure Buell did this for a reason... I would ask him why he has done this and how he came up with this, also what is this supposed to achieve according to him?
At this point everything is now an unknown because I was unaware you had drivability/running issues. I thought you were after tuning above and beyond the stock map. Are you in possession of a known stock map? One that for sure has not been messed with?
My controller accepts 2 sensors and the single gauge has 2 displays.
