I'm not to sure If my v was with me I'd have a look for you some one will no. could be anything why it uses loads of fuel could just need a service the list is endless bud
Pics speak a thousand words mate show us said wires comp fins on the turbo mate if it has play that may hit the side of the compressor inside the turbo whip the air filter off and see for side to side play and up and down play
Ill wonder out to the shed in a bit take some pics you want runner 3 worked on a lot massive restriction there also 2 as well but yes give them all a go