I recently purchased an old new stang one i used to own. 1996 mustang gt. Iwas just doing some checking up on things and my idle started hanging at about 2000 rpms in park. i am wondering if it is possible for the tps plug to have an issue i was prodding it with a volt meter just to check through the car and the sensor checked out fine. i started having the problem after that. and when i unplug the tps the idle drops to normal. plug it back in and back up to 2000rpms. could a connection be crossing in the plug itself now. this is what i get for trying to make sure it is ready to go for the summer should have never touched it