when started cold...the engine seems to accelerate and declerate while idling in park.like a rollercoaster. sometimes the engine even shuts off. what would be causing this? and sometimes it will cut off at a redlight when cold???

 

Remove, clean & test IAC as per link. http://www.fordfuelinjection.com/?p=39
Look for Vac leaks. Do error code scans. http://www.handsontools.com/Equus-In...ol_p_5574.html