Hi All,

I'm new to the forum and to Audi ownership.
I just purchased a 2002 a4q 18t.
mods so far are;
APR 1+ w/ injectors p/n 280 155 892
APR R1 DV
2bennett test pipe

The only problems I'm having so far is a cel of p0171 (lean code)
I've gone through the vacuum system and replaced almost everything.
I've checked the plugs and they are a nice coffee color so I'm thinking the unmetered air is getting in at the exhaust. I'll be replacing the manifold soon as it has a hairline crack in it. Lastly I found a crack in the turbo today so that needs replaced now. (if anyone knows of anybody trying to sell a k03s please let me know)

Any advice regarding repairs or mods is welcomed.

Thanks!