g2smooth

Hello I just got a 350z and she runs fine. In a cold start she drops to the normal 750rpm range she stays there until she gets warm and then some how she raises the idle to 1500 rpm which is not normal. I’ve disconnected the battery and done the relearns. Also she has new spark plugs and working throttle body (replacement from a working infinity) also all the maf sensors have been changed but she still wants to idle at 1500 rpm when she’s warm. Could it be the pvc valve shes dirty and I order a replacement. I need help!