i set my tire size as per the instructions2951mm for my 37's and it is way off now. it says im going way faster then i really am? what should i do

 

you have to set the gear ratio!!!

 

Just a thought, but did you make sure that you had the correct gear ratio entered?

Good luck hopefully you figure it out.

 

I have heard that if you change the tires or the gears you have to enter the info for both. If that doesn't do the trick my guess is something is wrong with the edge.

 

Make your gear ratio is correct and enter 2870mm for the tire size. I did a roll out the other day and thats what it came out to be.

 

Remember that you cannot change just one setting in the custom programming and expect the previously saved settings to still be held. Each time the edge writes a custom tune to the PCM it completely overwrites the previously saved tune. For example, when I enter the custom setup screen, my edge reverts all settings back to the default factory parameters (not FORD's factory parameters but EDGE's) such as, speed limiter=95mph, gear ratio=3.73, tire size=2356, idle=0 etc... So, if I just change my tire size and fail to re-enter the correct value for gear ratio then my odometer and my speedo will still be off.

Ox