'91 Dodge Wont Idle!!!

Ok Heres An Update On My Truck Problems. If U Remember, My Truck Had No "get-up-and-go" Power, And No One Knew What The Problem Was. I Had Three Lean Codes In It , And After Checking My Cat. I Ended Up Replaceing The Fuel Pump , Stranner, And Filter. Problrem Fixed. I Was So Happy. Now Though, After Getting My Truck Away From Those Damn Gagrage People, My Check Engine Light Is On And My Truck Wont Stay At An Idle When I Start It In The Morning! I Dont Know If They Screwed With Something Or Not, Bu I Know They Arent Getting Another Shot At It. ( Tried Charging Me 420 Bucks For Leaky Injectors!!!) So Anyway, Now I Have To Fix Another One Of Thir F-ups. Any Ideas? By The Way, Once Im Driving And Come To A Stop It Will Idle Fine. Its Just First Thing In The Morning....???