rough idle And missing out while driving on 1999 Ford Expedition

rough idle missing out,stumbling ,hesitating while driving

by in Blanco, TX on June 26, 2010
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3 answers
ANSWER by , June 26, 2010
plugs and coils are a good start. labor intensive if you have rear heat Roy
ANSWER by , February 26, 2016
I CHANGE THE PVC VALVE AND ITS STILL RUNNING ROUGH HIGH RPMS BEFORE CHANGING GEARS WHAT COULD BE THE PROBLEM
ANSWER by , May 18, 2016
Could possibly be your IAC (Idle Air Control Valve). On the 5.4L it is located under the fire wall. On the 4.6L the IAC is located driver side rear portion of the throttle body. Hope this helps