My car was always running fine but last night I went to start and it would only turn over , no start though , and when my key is in the on position I hear a fast clicking coming from the manifold .. B18b1 ef hatch ..

 

Obviously it isnt the manifold itself clicking, maybe pinpoint it a little better....

 

I can't really tell , posibly iacv

 

Sounds like you have a short somewhere. Clean/tighten grounds. IACV won't cause a no start. Start with the basics, compression, fuel, spark. Check fuses too

 

I have heard cases where a buzzing iacv was indicative of a bad ecu