Boostaddict wrote:So i spoke to the tuner and he said it definitely not the tune as the tune was spot on.!!
He thinks its valve stem seal from poor mantainence - not from me but previous.!
Exactly what maintenance is required to prevent valve stem seal failure at less than 100,000km?
And the symptom of such failure is generally smoke at startup (as oil runs down the stems into the combustion chamber as the engine sits idle, and burns in the first few revolutions of the engine after it fires up). Unless the seals are completely failed (and the oil's pissing into the combustion chambers, and you'd know if it was, because you'd be chewing oil like nobody's business), I'd say that isn't an issue.
If you're getting smoke as you rev the engine after it's warmed up, I'd say you're more likely to have a piston ring or landing issue (where oil is getting into the combustion chamber from below as revs increase and oil splashes up the cylinder walls past the rings, or maybe turbo seal issues.
And while you can't tell if the situation existed or not before your tune, and I wouldn't go anywhere near saying it's a good/bad tune without a lot more information, a tune is absolutely likely to have made such a situation worse - at stock boost levels it may never have gotten so bad (extra boost means extra pressure on things, advanced timing and lower AFRs means things run hotter, etc).