Quote Originally Posted by winfred
loads of black smoke in a diesel is unburnt fuel due to too much fuel or not enough air to burn it, i have no idea how the e34 diesels are set up injection pump wise so i can't really offer advice
Yeah I think the ECU is getting 'confused' due to turbo RPM and therefore boost pressure changes, due to the power oscillation problem - filling the tank has totally cleared this problem straight away...