'01 Audi A4 1.8t with 104k. I am having an issue with directly after start up the engine sometimes doesn't completely start. it gets to about 400 rpm and runs extremely rough until i tap the accelerator and then she runs smooth again and reaches around 900 rpm. The acceleration is weird, works great until I reach about 2700 rpm and then it stutters as I try to push through it especially in the cold. Engine code P0411. Just changed the fuel filter and checked vacuum lines and no change. Any ideas on where to go next are greatly appreciated.

Thanks,
Bryan

 

Have you tried Thottle Body Alignment? This may work, this may not, but it's worth a go. Look it up on here.

You will need a VAG-COM to clear the engine fault codes before you do the alignment otherwise it won't align.