My 1993 plymouth voyager is very very hard to start.?

my 1993 plymouth voyager is very hard to start. After starting you have to be very very gentle with the gas or it stalls. when idling it sounds great. I changed the fuel filter and cleaned the egr valve. What could it be. It runs great when running ifr you accellerate very very slowly. but can take up to 5 minuted to start