Reynolds,
The first thing to check for is vacuum leaks. DO you know how?
The next thing to check would be the IAC Idle Air Control valve/solinoid
see
Ford Fuel Injection » Idle Air Bypass (IAB)
You'll aslo want to check your air filter.
Do this first, and let us know how you make out, after that we'll have you pull diagnostic codes.
__________________
BroncoJoe19
2006 Alt Fuel Jeep (electric)
'98 windstar 3.8L
'99 Crown Vic 4.6L
'90 Full Size Bronco 5.0L
I'm not a professional mechanic, take my suggestions with a grain of salt, or a cup of coffee