I've been thinking today...
On the red trace which is cylinder 3 I remembered hearing a arching noise every now and again coming from the depths of the cylinder head where the spark plug sits. Does the waveform look like it does because the spark is arching from the plugs porsaline to the cylinder head spark plug tube?
I inspected all the plugs but couldn't see any cracks although I imagine the spark finds its way out to ground?
The car runs great now although the em light does come back on after the 4th start...
U1218 CAN bus, multifunction control module no comms
This one in before along with the misfire DTC but I dismissed it thinking it was just a random can bus no comms code. I can't seem to find any info on this. I presuming it's to do with the info display. I could check/scope the can lines into this unit?
I'm waiting on citreon getting back to me tomorrow. Does anybody have any ideas?