Can any one help ! My rover 75 2.0ltr v6 51 plate has a misfire, read the error codes and p0175 and p0300 are present. All plugs are sparking so coil packs ok but when I remove the leads from the front plug bank 1 I have been told the car doesn't cut out but cuts when I remove the rear leads. I carnt see that all 3 injectors are shot. So I'm thinking that it could be a wiring fault. Haven't checked any voltages yet but will be in the morning, so any advice would be grateful