Desperate for help here and new to the forum. I bought an 04 Mustang about a month ago with 98K miles. It started idling rough, check engine came on several times. It stalled out and died twice while my daughter was driving it. It also seems to stumble from 30-70 MPH while driving but still drives and performs. I've replaced the EGR valve and sensor. Replaced one of the egr hoses. Replaced the Air intake control valve. Replaced the assembly that the sparks plugs plug into. Replaced the gas...

04 Mustang 3.8 V6 Rough Idle, Stalls, Gas Cap