[Mikaila31]

I bought a UG for my 1999 Mazda 626 (V6) over a week ago. So far I have just been playing around with it. I've had a few difficulties with it and am looking for some help. First it doesn't seem to be reading actual MPG or average MPG correctly. It seems okay at low speeds, but around 55mph my actual MPG jumps back and forth from 0 to 30ish. Sometimes both MPG readings will flash or hold error for a few seconds. I assume its having difficulties reading the car correctly? How do I fix this?

Second problem is calibrating distance. Along with it having difficulties reading, the numbers I am getting from it I don't quite agree with. Average MPG it reports is 30mpg I've always calculated mpg at each fill up and my numbers are much lower. I assume this is because it is uncalibrated. I read the manual and it goes on about lining the front tires up w/ a mile marker and driving to another mile marker and entering the value into the UG. Only problem I have with this is where in the world am I suppose to do this? Mile markers are only on the interstate....

thanks for any help.