This maybe a dumb question but how do I go about resetting the ECU.... I dont thing that could create such a high idle but im not sure. The throttle body cable when the car is off allows the throttle body plate to close completely.... could it be different when the motor is running? Finally im sure its not real safe to allow the car to hold rpms at 5.5k rpms while I check this stuff.. so what do I do there?

thanks