hi,can anyone help my 98 2ltr petrol crysler voyager is only running on two cylinders ( 2 and 3 ) there is no spark at 1 and 4..i have replaced the coil pack but the problem remains.im not over good with modern engines but maybe someone else has had this problem and it an easy fix....the car starts first time on the button and runs on the two cylinders....thanks for your help