Hello! I'm not new to this post but new to posting anything on it. I have a 2005 jeep wrangler X that has been starting slow. When I put enoough gas in it past half it starts just fine. Does anyone know what could be wrong? the check engine light came on and it read one of the the 02 sensors needed to be repalced and i had it replaced. it still stalls when started. HELP!