Just today I noticed when I turn the key on my 99 gtp i can hear a clicking noise that seems to be coming from a sensor just before the supercharger intake. When the key is first turned on i hear a noise kind of like a current arcing to something towards the drivers side at the back of the engine bay. also when i turn the key off there is another clicking noise but i am not sure where it is coming from. when the key is on the noise coming from the IAC sounds like a typewriter, not too sure how to really explain it.