I've got a similar issue to others reported here but as yet unable to find any solid answers other than one user saying replace oil pump. My VE makes the same noise as video link and idle drops and comes back a few times within 3-4 seconds all whilst making this sound the whole time (3-4seconds). Mine has fresh 5W-30 in it which seemed to decrease the amount it happens, now its like a random cold start draw where most of the time it will do it but sometimes magically it wont. No codes shown I cant see how checking/cleaning oil pickup will fix as a sludged up or blocked pickup should cause dramas all the time not just start up? Oil pump would cause it to throw a code for low pressure would it not? Are chain tensioners hydraulic? Its a long shot but seems as though chains are lose and timing goes out a touch at this point on cold start - hence the idle drop and then its comes good. Any help would be great as this surely cant be an Alloytec trait we are supposed to live with. I get cringes from people in the carpark when I start up sometimes. Pete.