superbros

So I started experiencing my rpm rise more than usual, as if the gas were going on its own when it's on neutral or on any gear. When I'm shifting to 3rd gear...during the transition(clutch) my rpm goes up to 2000-3000..but then settles as the shift is changed..it happens on every shift. I cleaned out the throttle body, and replaced my iac and I don't have a vacuum leak...but what I did notice is when I disconnect the electrical part of the iac, a turn it on, the cars' rpm works perfect (1000)..but as soon as I connect it, it begins to rise (1,500-2000).. please help.