Engine Shudder

[hyperexplore]

I've got a 2000 Mountaineer 5.0 , When parking or slowly turing into my drive way not even at full steering lock the engine will studder like it wants to stall but never doe's stall. What could this be. I recently cleaned the throttle body and that helped with the sticky gas pedal.
Thanks for any help on this.
Neil

 

[BrooklynBay]

Did you also clean the IAC, and MAF?

 

[hyperexplore]

no

 

[Lazzman]

My 4.0 Sohc does that same thing at idle.

I think I have a vacum leak someswhere.