When I start my seville it idles ilregular and you have to hold the gas pedal down to keep it running. Sometimes it stalls after starting or while driving. I have to wait about 2 to 3 min. to start it again. Does this when it is cold or warn. I changed the plugs and wires, fule filter, and check coil packs nothing has changed.
Please help

Have you tried cleaning the throttle body and the egr valve?