I want to add an ultra gauge to my 95 XJ... Would an OBD1 to OBD2 adapter make this work? Is there any way I could make the gauge work?

I doubt it will work,Only ever seen the high end scanners that could read both.

what you would want to be using is a MPGuino
im pretty sure i read somewhere people where using there in 89-95 wranglers with the l6

what do those do exactly?

OBD1's computer does not have the information required to operate all but a very few of the functions of the UltraGauge. Not worth the price for the return.

ok, that's what I needed to know. Thanks!

They look at vehicle speed and injector pulse width, then calculate MPG used, miles traveled, etc. Its basic trip computer functionality, using the raw vehicle data.

My old OBDI Cadillac had the same functionality built-in, using the same basic model.

I'm not sure how it would tie into an Ultra Gauge, I guess you could integrate the raw OBDI data and the trip data to build something.

where can I get one? Haven't been able to actually find a site that sells them. Just has info on them

I don't know. I just read through the info on the link.

From a google search i found this.

http://mpguino.wiseman.ee/eng

Sounds interesting.