Originally Posted by ronk1200lt
After having a rhinewest chip and remus exhaust installed on my bike my Distance To Empty Gauge seems to have gone crazy. When I fill up it shows a DTE of 350 Km. However after 1/2 an hour into the ride it shows a DTE of 200 Km. Then it seem to sit there and actually reverse itself so the DTE starts to rise. Eventually I get about 450 km. out of a tank. Is there any way that the DTE can be reset, or am I just stuck with an inaccurate gauge because of the change to a performance chip? Thanks Ron
Ron, I don't believe the chip had a thing to do with the DTE; in fact, I doubt that the DTE is operating any different now than it did before.
The DTE is purely an estimated "best guess," based on (i) the volume of fuel left in the tank; and (ii) the current mpg observed by the BC. There are two sources of error.
The gas gauge (from which the BC gets is fuel volume reading) does not instantaneously respond (to prevent having the needle hopping up and down as the bike is driven). Refuel and turn on the key, and the DTE will be based on an under-reported fuel level -- thus the potential for an increasing DTE estimate minutes later.
The mpg estimate responds *much* slower than the fuel level; the estimate is based on fuel use vs. miles covered over a large averaging interval.
Taken together, if you fill up after stop-go-traffic, DTE will be low (low mpg, under-reported gallons). Drive at highway speed for 1/3 of a tank, and the mpg will be higher, possibly high enough to result in a higher DTE, even though a couple gallons have been burned (seen that myself). Get back off the highway for a long period, and the average mpg will drop, and thus the DTE will drop much faster than you would have expected from when you were on the highway.
Thus, your variations suggest to me normal operation -- with the greatest variable not being the chip (which has literally no connection to the BC inputs), but the five-element device attached to the throttle grip at the end of the driver's arm