1/ Floor it and get it flying, (80mph ish in fifth gear)
2/ Let go of the throttle and ride on the overrun for about ten seconds 3/ Floor it again.....single puff of whitish smoke.At no time do I change gear or over rev the engine, I generally try to change at no higher than 4000rpm, but sometimes go to 4500rpm. In addition despite several attempts, I only reproduced the phenomenon once...
She doesn't smoke under normal circumstances, and I don't get the classic turbo smoke if I leave her standing running for a while.
What's going on? I don't appear to be losing oil, I'm not aware of any sign of a head gasket problem. Could this be un-burnt fuel just smoking off in the exhaust system, i.e. nothing to worry about
OR
is my beloved C900 about to go pop....
Thanks
Al