Hi there, new to the forum but a long term reader/researcher.
Looked around but not seen much similar on the forum. I apologise in advance if it's been posted before and I'm just being blind.
My Black Edition Quattro has started smoking at around 2750RPM, the smoke seems thin, white with maybe a blueish tone.
Car is a starship at 238,000 miles with full main dealer service history (every 6-10k miles) and 3 timing belt changes with the most recent at 236,000 miles.
No smoke on idle, no smoke at any other time, fuel efficiency maybe not as good as it could be but tolerable at 30MPG - 35MPG.
At a loss at what to check, I have access to live data diagnostics and read injector values which seemed within suitable ranges (-0.68 / +1.54) although the injector that read +1.54 was cylinder 1 initially and upon further testing diagnostics read cylinder 4 as 1.54 and the others all in -0.68 - 0.58 etc.
Smoke seems to start at 2750RPM and clears after 3500, DPF showing 0% soot accumulation and 500km since last regen. No loss of power, no strange engine noises.
Any advice would be greatly appreciated.
Cheers
-D