yes, a couple questions.
do you have the sensor installed and working?
what version software is in your Scanmaster G (boot holding the left button)?
basically you need sensor 9 to be configured as fuel pressure in PSI, we enable that sensor channel in the CAN broadcasts, and then we enable a 'can test message' that tells the Scanmaster what the data is. This works in Scanmaster versions 1.10 and later.
I'll get the rest of the details together once we answer the basics, I was going to make a YouTube video, haven't had the chance