I was wondering if anyone knows where I can get a fuel temp guage for a '99 Cummins? Or does anyone know of an OBD II tool that I can leave in the cab while I'm driving that shows fuel temp. We've used the Snap on scanner and it shows fuel temp but that thing is too big to drive around with. Is there a solution for a palm Pilot that is inexpensive?

The reason I'm asking about this is because I have a vegetable oil system installed and I want to monitor the fuel temps at the IP to make sure they don't go too high.