OK, will wait bit longer.
More info:- when turn car off then restart, it clears completely. Also taken cowl off engine - there's T piece pipe from turbo to airbox, centre of pipe goes back to centre of engine opposite oil filler cap which has broken clamp and wasblowing oil out. Could this be cause or electrical prob? Turbo appears clean and no wear visable on propeller.
yes runs perfectly normal, then revs drop like stone - bit scary when overtaking and my babies are in car