So the one on my B16a is junk. Is there anyway to troubleshoot it? The manual wasn't much help. If it is bad what USDM car do I order it for and does anyone know about how much it costs? It's completely retarded right now, one second it's trying to idle on the high cam, the next it changes back and idles somewhat normal. Then we can hear it clicking as it switches back and forth. It's running like total shit, but the solenoid valve is the only code it's spitting out.