Double Check That You Secondary Link Rod Hasn't Fallen Out Of The Linkage. Those Little White Plastic "pop-fittings" See A Lot Of Heat And Disintegrate. If That Is Indeed The Problem All The Pieces Can Be Had Through Ford For Around 20 Greenbacks.
Is The CEL On For Any Codes? If So, Get The Code Pulled And We Can Go From There. Auto Zone Is Free For This Service. Just Be Sure To Write The Actual Code Down And Don't Listen To Anything The $7.00/Hr. Employee Tells You.
Disclaimer: I, In No Way, Mean To Bring Embarrassment Upon, Criticize, Or Make Light Of Anyone That Works For Minimum Wage Or Wages Thereabouts...Other Than Autozone Employees, Because They Lack The General Knowledge Of Alphabet And Those Things We Call Numbers.