Hey guys looking for some advice here.

My '94 manual keeps going into a fast idle mode. When I stop, it will come down after maybe 10 seconds, but as soon as u even tap the accelerator, it jumps to fast idle. This will happen every time.

My mechanic replaced IAC, but it didn't help. I read a bunch of the other threads about bad or high idle, but didn't read any with this exact issue.

I'm pretty sure he has checked for vacuum leaks, other than that, any other ideas? Tps?