EGR
I give a good guess ,also on EGR remove it and spray it good with throttle body cleaner ...Not carb cleaner .. hope that works .. If not give the old disconnect the battery for 30 min. routine ,, ( 
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1991 5.0 NotchBack,Black
as of 05/04/09 34,300mi.
2001 LIGHTNING Black 29,872 mi.
05/04/09
(Hangar Queen)
SMOKEM UP
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