I never got mine working correctly. set it up like the manual says, and it tests fine but when I get on the road above 4k rpm's it goes crazy and gets out of control flashes. I called them 2 days ago and asked if maybe I had a defective unit, they said its very rare and to check all my connections again. then if that doesn't work look at the trouble shooting page on the website.
Hope I figure it out soon...
what happens when you set it to be like from 1k-4k? same symptoms? like changing the range on it