I have a 01 A4 1.8TQ.

For last year or so, I had a lean system code. So when I finally got around to it, I tried to clean MAF and check for busted vac lines. I did clean MAF but couldn't find any busted vac lines. So I took my car to one of the independent shops and they found one of lines with a big hole in it.

Now my car runs a lot better than before, but still does hesitates unless I step on it like a grandma.

So I am planning to replace all the vacuum lines. I am wondering whether any of you guys has done it before by yourselves. If so could you please tell me part numbers for all the stuff that I need to replace and where I can get it, besides a dealership? If there is a DIY article, I would love it.

I am not a total noob, but a newbie nonetheless. Thank you.