RPM sticks while driving

Hi all I am having a problem with my stang. Whenever I am driving and push the clutch in the rpm's shoot up to about 2500rpms and sticks there for a good couple of seconds. Also the car idles higher then it should.

Ive checked the vacuum lines, cleaned out the IAC (wasn't dirty), cleaned the MAF, Regular tuneup. I believe i replaced the tps at some point in the past along with O2 sensors.

Anyone else have a similar problem?