No power throttle unresponsive in gear,dies,flashing overdrive light,

What is your question?

Replaced fuel filter,air filter,M.A.S.,pcv filter in air box,cleaned idle control valve,new computer with update flash(car acts the same with no check engine light),change oil and with proper oil filter,recharged air conditioning system,flushed transmission and transmission cooler. Checked transmission selector switch,seemed to be in proper possition but indicator lights at shifter give duplicate readings. Runs weird and even weirder with accessories on fluctuating idle but can be revved to over rev rpms and can get over over rev rpms in first gear with a running start but can't pull hills or accelerate off the line have to gradually get momentum, Tried idle reset procederures from Haynes manual,this Mystique is a mystery Sears found no error codes and neither did Ford dealership.