Originally Posted by crashradius
all I get is a sucking sound from the throttle body.
It sounds to me like you may have a vacuum leak going on or something is up with the throttle body itself like gaskets perhaps? Can you say with complete certainty that it is the throttle body itself? I would be checking all of your vacuum/emissions lines under the hood for cracks, dryrot, etc. I had an odd situation a couple months back with my car and it ended up being a plug that sits dead center on the underside of the throttle body that actually fell out and ended up laying in between the valve cover and runner control on one side. Not saying that is your situation here, but stranger things have happened!
If you know a friend with a stethoscope, that might be worth giving a shot. They make ones for situations like this that have a metal wand on the end instead. I think they're pretty cool.