hey i was wondering whats a good carbon remover cleaner for your engine is internal i mean not to wash it because i took my car to go get emissions and it says i have carbon buildup i used to use seafoam on my american cars but dont know if i should use it for the audi can you let me know thanx

 

try some fuel system cleaner

 

I used sea foam, did not see big diference.
carbon deposit is bad, I have this issue too, engine like to ping under certain conditions

 

Hook a small diameter vacum line to the manifold (between the TB and the head) and then stick the other end in a 20oz. bottle filed with water and rev the engine a littleto suck the water out of the bottle. There won't be enough water flow to hydrolock the engine, but it will steam clean the combustion chamber and exhaust ports (think about what a cylinder looks like after a blown headgasket).