Hopefully someone can help? My Mondeo starts great every morning except the engine seems to rock back and forward for about 30 seconds!! Its not the injectors as they have been checked? Car runs perfectly after 30 seconds or so, there's no smoke on start up and glow plug lamp not flashing in fact it never comes on when i turn ignition to position 2!! The heater lamp does work as i have tried the instrument panel test. Very confused. The car never misses a beat only 1st thing, any help would be appreciated.