We bought our 65 plate 1.6 B-Max Auto earlier this year. It had only done just over 1200miles when we bought it - over 4000 now. We've been experiencing juddering with a loss of power and no warning lights except for the fact that miles per gallon reading goes to ---.--- If we turn the ignition off and then re-start, everything works as normal. We don't think that it can be a drive-train/gearbox/clutch problem but we aren't getting any warning lights to show an engine or any other fault.We've taken it back to get fixed and they've found: "2 x HT leads wet at point of coil pack - dried off and resealed." Fault is still happening - any ideas guys?