I have a 97 expedition with 179k. The truck sometimes begans to rev when o...

...place the truck in park. why? The truck has hag some issues. The fuel pump has just been replaced. And i have replaced the EGR sensor. Now when i go to drive the car sometimes when i stop it does not completely do gown to idle speed and then when i go to park the truck starts to rev up when i place the gears in park.I am not sure what is going on. I am looking for any help on what is going on.
 
Top