I have a mk4 Ibiza Cupra petrol and it has suddenly started to puff blue smoke when I'm pulling off for the first time in the mornings and also on the overrun. Also when I rev it as the revs return to idle it sort of revs itself a tiny bit aswell which is strange. The engine has just been rebuilt fully and including a k300 turbo. The whole setup has only done around 2000 miles. Any help would be great.