Got an 06 wrx, she runs great but when my idle dips at times like coming to a stop, feathering in traffic, turning the wheel while not moving, I hear a tick coming from the passenger side. I keep my idle around 8-900 to keep it from ticking all the time. If I lower the idle to around 500 it ticks constantly. I've tried to get out and listen for it but I can't locate it for the life of me. I'm worried it's something bad with one of the valves on the passenger bank. Or best case scenario is it's a vibration that I can't locate. I can try to get a video if that might help anyone.