What sensors are we not using on our engines?
These unused sensors can be repurposed to show up in our hp tuners logs. (Kind of like the HP Tuners Pro feature)
- air conditioning pressure sensor (this also has an ECM controlled fan circuit, which could be re-purposed)
- fuel tank pressure (ECM uses this to control the EVAP canister vent solenoid valve)
- catalytic converter temperature (I think this is what HP Tuners calls the post catalytic converter sensor)
- heated oxygen sensor, post catalytic converter. (Perfect for a wideband O2? Would need to disable all ECM use of the original sensor)
If I was to use an arduino, I could re-calibrate the fuel level sensor, and add an independent fuel gauge that is a lot more accurate.
Then the stock sensor could be re-used and logged in HP tuners. Maybe a fuel pressure sensor, and the stock fuel level indicator would actually be my fuel pressure gauge. Probably should print a new gauge faceplate for it, and calibrate it.
- fuel tank level sensor.
This guy used it for his fuel pressure.