Misfire at 1500 rpm and blue smoke 1.9cdti 150

[rob181967]

Hi all having a problem with our zafira 2009 58 reg 1.9 cdti 150

It's got rough tickover a misfire at 1500 RPMS and blue smoke out of exhaust, I've changed the fuel filter ,oil filter oil and glowplugs and done a regen but still the same no loss of power and no warning lights 

Please help I'm in trouble with the wife for buying a lemon lol 

Cheers rob