I went to St Enoch's garage in Bradford because my car was blowing a lot of blue smoke,they implied it needed 2 new injectors at a cost of £600 to fix the problem (not being mechanically minded) i agreed to let them do the work,next day SAME PROBLEM ,when i challenged them about it they said they changed the injectors because it was mis-firing (NOT THE PROBLEM I TOOK IT IN FOR) and said it COULD be your heater plugs at a cost of another £250,at this point a few words were exchanged & i left feeling totally ripped off,could any mechanics out there tell me if either of the suggested repairs above could account for my car blowing blue smoke when started from cold.