Strange noise under accell/revving whilst cold

For the past week weeks ove noticed a weird noice coming from the engine that only occurs under accell during the 2000-3500 rpm range, and mostly while cold. the best way i can describe it would be to say that it sounds like the noise made when trying to drink through a straw that has a slice in it, combined with a metallic ringing.

Dunno if it has any bearing, but I also have the injector tick :ranting:

WTF!

anyone?