Freon wrote:You may have bricked the ECU and may need to purchase a new one. You need to be careful about what you flash onto your car.
Given it's an EVO (I assume it's an EVO from your avatar) then it's REALLY hard to permanently brick your ECU. Colby once said words to the effect of "You could burn Mary Had a Little Lamb into your ECU and still reflash it afterwards" (or something like that).
The important thing is the immobilizer code; so long as you burn the same ROM version back in with the correct immobilizer code for your car, it should be happy.
I don't know how to help if you didn't back up your original ROM image / don't have the immobilzer code. Mitsubishi Dealer time I guess.