If you are coming to the Nano see if while there you can get the O-rings changed, the Fuel filter fit the Maf maybe go back too the original EGR
change the PCV
filter all the above would only take about 90mins worth a try in my opinion then get it on T4
see what then happens Arctic.
Unfortunately I can't make the Nano. I have changed the Fuel Filter and Housing, the PCV
filter was changed 4,000 miles ago, but yes a good idea. I hope to be up within the next two weeks or so to take up Paul's offer of elimination.