I use one and monitor volts (for glow pllug operation) MAP (for boost) trans fluid temp, and MPG. I wish I could get it to display oil pressure, water temp, and of course EGT but so far I've had no luck with the first two. I know the EGT won't be displayed but dang it, the PCM knows the oil pressure and water temp so why can't I get it? How about you RJ, what are you watching?
im watching MAP, Trans temp, Water temp, and Air intake temp. read the book, you can tap into the X-gauge and make it do alot... if you dont have one let me know and i can give you the codes. its kinda a guess, there are several codes that it could be, but one of them will work. there is a index in the book that has the X-gauge codes. hope this helps.....
I got the X-gauge bit to work for the trans temp but the one I tried for the water temp didn't work. Maybe I'll try another one. They are long and tedious to enter but very nice. I look at intake air temp every now and even fuel rate sometimes but not often.
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