2.5na smokey on start up

I have just put my s3 back on the road. It now has a 2.5 na diesel. The conversion was quite straight forward. I am very happy with the result. It's not fast but does seem to get 30ish to the gallon. The only problem I have is that the engine is rather smokey when first started from cold. When it is warm is does not smoke. Anybody had a similar problem? Thanks for your help. If you need any advice on this conversion for your series 3 , then just ask.

What colour is the smoke?

If it's a thin blacky/grey when cold, it means that you are getting a smidgion too much fuel being pumped through on start up.

If it's OK, then don't worry about it

Think it's more blue, which is engine oil. Just not sure if it could be valve stem oil seals or needs rebore. Compression test I guess is needed. However it runs and pulls ok and just assed mot so not too bothered.

could be injectors buggered

Try some Millers injecter cleaner in your fuel tank in case injectors are dribbling.

i wouldn't worry about it, it's part of the series charm