I've certainly had a ticking sound when cold - a very discrete, sharp "tick" - which after running a few minutes goes away. Usually apparent after periods of non-use so its not always there.
Also, if its idling at 800rpm (13.3/sec) then the 4th (firing) stroke is around 3.25 per sec which was about the rate of my ticking. But CAN an injector "tick"?? I dont know - just thinking out loud, here!
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2002 D2 S8 – Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18” Avus, ski hatch, Bose, auto dim rear view mirror, rear blind.
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