Hmm - that works until the Mrs goes to cook something and does not know a fig about fundamental cooking temperatures and times. Do you cut out the cooking instructions for this eventuality?
Not surprised your annoyed to be honest.
Hmm, this could be an issue with a coil pack, glow plug or injector but your best bet would be to get the car plugged in for a diagnostic check.
Keep us posted on how you get on.
Cheers
Steve