I have a 2001 durango with the 4.7. It has started to tick a little at idle and more pronounced under accelration. The OBD gives codes P0206 and P0304, which are cylinder4 misfire, and injector 6 circut malfunction, would this be caused by a bad injector? I have also found that the fuel rail where the injector plugs in on cylinder 4 was wet with gas. I need some help.