Rough idle
 

Hi all. I recently tried to run my A6 4.2l after storing it through the winter and it idles really bad. The check engine light flashes and there's water dripping from the exhaust. I installed new ignition coils and spark plugs last summer before i stored it so i doubt that those would be an issue. Any leads as to what i should look for?

Probably there is water in the tank from condensation and the fuel started breaking down. Did you store it with a full tank and a gas stabilizer or Seafoam?

I have about 3/4 gas in it but no stabilizer or seafoam. Should i drain the gas out?

I would at least add some dry gas and top it off as much as possible with fresh fuel, or drain the tank and add new gas after.

Ok. I'll try that and see what happens