Just got a VDI ecu in today for my KQ750. Installed it at lunch, no dice, it will crank but won't fire. I am not real happy right now seeing how I just spent $540 for a paper weight. Velocity's customer service is good but now I'm gonna have to deal with troubleshooting when all I wanted was plug in and go performance. With the stock ECU, the quad runs fine, starts quick (24volt setup). They are saying maybe I have too many mods for it to work correctly right out of the box, who knows.