Compression test/Smokey

[DazzyA]

Just carried out a test and to my surprise the readings were pretty good, 12 bar. I did it because I have noticed a bit of coolant usage and some smoke.
Car is fine when started, but after a few minutes she start's to smoke quite heavily with a white/grey colour.
During a run and straight after the smoke has gone, but returns again after idling for a while.
Can any one help with a possible cause/cause's. The exhaust get's very wet and smell's a bit like marzipan!
Someone has suggested a rich mixture??????

thanks.

[Cyruz]

Mine does exactly the same... I would like to know what people think , mind you I have a hole in my exhaust so it could just be condesation.