My golf (150bhp tdi) is broken
When the car is cold the turbo kicks in when the revs go over 3000rpm, and then blows black smoke out of the exhaust. ....Not good.
But when it's warmed up it has no power (slows down going uphill).
It is very slow and the turbo doesn't kick in at all. Not what I'm used to.
I've changed the air mass meter, but this made no difference.
I took it to a VW specialist who said the turbo is losing boost (I could of told them that!!) and although their computer said the turbo is the problem they actually disagreed with the findings and said "it's probably something stupid, but we don't know what. We will need 4 hours to strip things down and have a better look". (Great... they had the car for two days to tell me this).
Has anyone got any ideas?