I'm wondering if anyone has experienced any problems with this unit on their fuel injected Harleys. My check engine light came on and gave me a ECM failure code. However if the ECM failed the bike would not run at all. It was only firing on 1 cyl and sounded like a loud Vespa! My dealer informed me that the FI2000 was defective and needed to be replaced at quite a cost. I decided to remove the FI2000, which consisted of unplugging the 2 O2 sensors, the crank trigger, the 2 fuel injectors and ground wire. I found the wires to the rear fuel injector was broken. So I repaired it and the bike ran great! So now i need to reset the codes and see what happens. So check all the wiring before you replace this expensive unit!!