u/Aromatic-Citron4835

hi all needing some help with 2010 Audi a6 3.0t. engine code says incorrect purge flow. codes keep changing it’s had large leak and small leak codes also but not now. I’ve replaced charcoal canister, purge valve , gas cap and evap test computer and still having an issue. when I fill tank up it’s hard to start which is why I replaced charcoal canister. I’ve replaced all that I can think of. fyi car runs and drives great🤷‍♂️ Any ideas would be great