Going to work ,bit late so gunned it a little.my engine started to stutter and misfire,engine light flashing. Stopped at petrol station ,AA called ,guy tested car got p0300,p0301 and p0302 codes come up ....he says plugs or coil packs at fault . But does the coil pack have its own code .and both packs failing at once seems a little far fetched to me . i was thinking maybe a vacum issue as my plugs did`nt seem that tight .when i started to take aprt engine at home..... ?