I have a 2005 Tribute with an occasionally sticky accelerator. Sometimes, when I shift (manual) the accelerator requires some umph to press down. However, if I let up on it slightly, it presses down without any problem. I took it to the dealer and he just replaced the unit. The problem has returned. It doesn't cause any problems as taking pressure off the pedal and pushing down on it again solves the problem.
Has anyone else encountered this issue?