Hey. I had this exact problem with my old '94. Throttle wasn't stuck at all either, though it was my first guess. I'd start the car and instantly it would take off to 3,500 rpms and hold there. Had to drive the thing through town to get to the highway to drive 70 miles to my preferred shop at the time. Was having to neutral drop at every stoplight to stop from frying my brakes and drivetrain. Painful.
I think these guys are right about the IAC. My memory is a little fuzzy 'cause this was a couple years back. But, if that doesn't work, you could check out your voltage sensors. I know the same shop replaced that as well, but I think it was later when I was having issues with my brake pedal going solid on me. In winter at that! Turns out it was a simple vacuum manifold. I haven't been back to that shop since.
But yeah, I feel the hurt...