customizing OBDII parameters
There are so many variables being tracked at the ECU level, but very little is sent to the OBDII port.
I am using an ultragauge to monitor a few things on my volvo 6.0l swap, and would love to add a few things that are being monitored at the ECU level such as oil pressure/temp.
What determines what variables are being output to the OBDII port?

