Originally posted by "Dragon240sx"

I have a problem with my RPM's rising and droping when im sitting in neutral and when I turn on the AC it stays at 3 RPM's I've been told that it could be a number of thing like one of my vacuum lines are disconnected
and i checked that and it isn't. I was also told that my map sensor is messed up or that my spark pluges are miss fireing. so what do u think it is?