Mx00 MAP and EMAP sensor calibration

[Scott@FP]

The software only lets the MAP and EMAP channels display (kPa) data in increments of 0.5 kpa, the BAP and User (and Oil/Fuel Pressures) channel setups allow 0.1 resolution.

Is there a way to calibrate a pressure sensor on the MAP or EMAP input to +/- .05 kpa without moving it over to a user channel, writing the cal, saving the cal, and moving back over to MAP/EMAP?

[MarkMc]

The MAP channel has a resolution of 0.5, that is the channel so no calibration will make it higher resolution. If you wanted to do tuning at 0.1Kpa resolution you could simple use the User channel as your load/efficiency axis on the main Fuel and Ignition tables.

[Scott@FP]

No Sir, I don't want to tune to that resolution, I want to calibrate the individual sensors to that resolution so they all read the same. I guess I want beer on my wheaties and don't want to have to move around the input channels and move them back if there is another way, getting lazy I guess.

[MarkMc]

The Calibration should not need to be done at different resolutions. If you have a MAP sensor every one I have seen is a linear calibration. Lets say the calibration is 0.5v is 0Kpa and 4.5v is 100Kpa, that is what the sensor does. If you connect that sensor to the MAP channel that same sensor and calibratino will read in steps of 0.5Kpa, if you connect that sensor with the same calibration it will read in 0.1Kpa steps.

It has nothing to do with the sensor or calibration, it is the channel in the ECU software that sets the resolution.

[Scott@FP]

Mark, I sent you a PM trying to explain in detail why I'm trying to do this, it is sort of outside the realm of 'normal' usage. But the basic question is answered- certain channels display at certain resolution because that is all that is necessary. Thanks.