Ok so I replaced my intake manifold with an AEBS and the throttle body with a Oyddesy tb. I also got a fresh IAC and when I replaced it I also replaced the intake manifold gasket. There are no vacum leaks and when I start it, it idles at 5.5k rpms... but I turn it off right away... what other problem could this be? Note I also deleted the fast idle... its a B16