DOH!, I mean major.... You got me wondering if I should try it when I get to that stage.MCubed said:Well, tapping the HKS into your ECU shouldn't be all that hard, but leave it to me to futz it up. My vampire tap wouldn't get a good connection, so I kept clamping down on it. Eventually it cut through the speed wire and shorted some other wires out. Then everything broke: speedometer (of course), odometer, fog lights, brights, cruise control, headlights are always DRL, ABS light came on, CEL came on, and the engine chugs at 5000 RPM. Yech!
Anyway, the dealer is charging me 370 bux to fix the wiring and hook the TT up correctly... I thought I'd need a new ECU!