1999 Dodge Intrepid EGR valve?

I have a 99 Intrepid that had a 2.7 motor originally.
It was replaced and all components at 132,000 miles with a motor from a 99 chyrsler 300 with 58,000 miles. (Now car is at 200,000)about 6 months after motor was put in, one morning car died. I assumed it was to cold early morning and it restarted no issue. Gradually over the last 2 years I have noticed it died more and more here and there with no warning. Sometimes when it dies it would restart by itself, sometimes it takes up to 5 minutes to restart. No engine codes been to dodge and chrysler they milked me with new parts and no answers. The other day got a code for a EGR VALVE and it blinked off never to be seen again. In the last 2 months I cant get to work even cause now car dies daily randomly and now it will either restart itself (keep in mind its like popping a cluch but its a auto and I didnt touch anything)or it will die restart within 3 hours. I will go to leave for work at 9am car just cranks and cranks then at 10 or 11 or 12 it fires right up like nothing BUT there is a chance I might die about 2 miles from my starting point, or it might run all day no problem. No noise or warning or sputter its not hot just left house within 2 miles and its 30 degrees out. Or 50 degrees or 70 it doesnt matter. One more symptom is everyone in a while a rough idol it wants to die if I hold it around 1 or 2 rpm it will eventually smooth but I have learned to brake and gas same time cause I dont trust it. Its like its haunted and has a mind of its own if she wants to go we will go if not people are honking and starring and nobody helps a woman stranded in road anymore I am a single mom whose been through the cleaners already this car supports my 2 kids and myself I clean commercial and residential so if I cant get there its a problem, can anyone help? Thanks for listening to me blabber on! :)