Big grin Alfista
AO Silver Member
Join Date: Sep 2011
Location: United Kingdom
Could it be the MAF? Low power, hesitation (jerkyness).
or I had a Volvo T4 turbo with similar symptoms (no black smoke though) and it was Turbo Boost Valve Sensor, which was a fairly cheap fix £65 plus £30 labour.
If black smoke though is it EVERY time you boot it or just after driving slow/not using for a good few hours? Do you still get the black smoke when engine is warm or after a few miles of +2000 revs? I'm no expert but black smoke could be a split turbo hose and it could also explain lack of power/big flat spot.
TBH it doesnt sound terminal. And as someone else said, is it still remapped?
EDIT: My Volvo fix was using 2nd hand sensor but bought from a recognised dealer.
2nd Edit: Just seen your in Malta, shame, I was there 10 days ago in St Julian, could have had a look!
2006-2008 156 2.0 TS Lusso
2011 - now GT 1.9Jtd
2015 GT 1.9 & 146 1.8 twinny