Jim, I can read everything else through the OBDII port, but I'd rather see it on the display. Not the easiest thing to stare at a laptop in the passenger seat while you're trying to control the car. It's either IAT or fuel pressure, and fuel pressure parts will cost an $75 or so. Getting my IAT should be free of extra expenses. Shame the Zeitronix display won't let you replace the EGT reading for something else.