I need some help in diagnosing the actuator. When i turn the key and hit the switch to on, the butterfly opens but doesnt complete its cycle and stays open and stops there. Do i just need to replace the actuator or are there other things i should be looking at as well? If it is bad and nothing can be done, do i have to replace to whole secondary throttle with the svta or just the svta? any help is welcomed. Thanks.