Saber,
Welcome,
I have been working with Cristiano on the Pro gauge and testing it as I have a full complete set of Spek Pro Gauges. The only gauges that work right now from the Proparts (Spek) brand are the Water Temp and Oil Temp, Speedo and Tach. I know of a couple of people have used the Fuel Qty as well (I have not confirmed it yet). As for the Psi Gauges, They are not working unlike the temp gauges the psi gauges use a 3 wire connection to the sending unit (5 volt reference, Ground and a signal wire) I'm hoping Cristiano and I can figure it out as I have the the gauges and he has the programing and electrical background. I have been meaning to contact him and send him a PSI gauge for him to test with. I'm sure he will come up with something just have to see what his magical mind can do.