Hi I have owned my fiat sedici 1.9 diesel for a 12 month but last week she became very low on power when pulling off until the revs build up. I clean the EGR which was all sooted up and it have made an improvement but it’s still abit low on power to what it was there is also grey smoke when coming from exhaust when I rev it up which it did not smoke before...any advice I would be grateful...thanks Fred