3.0 asb blue smoke on idle

Darren_a6_3.0_tdi

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Hello my names Darren,

I'm new to the Audi scene and new to this forum im after some help!!

i have a A6 3.0tdi ASB lemans Avant.

i purchased the car last year and it had already had the rear box removed, I already had a plan of removing cats as heard they sounded awesome straight piped.

so i purchased the darkside developments exhaust kit, once fitted i instantly started noticing blue smoke once warmed up and on idle.

it varies how bad it is some days it don't smoke at all (or i don't notice it) other days it smokes badly but only notice it on idle/

i looked up on posts on internet and its pointing towards injectors my question is had anyone else had this issue?

and is there a recommended place to send my injectors for tests or refurbishment