Quote:
Originally Posted by Scott ZHP
Late to the party, but for future reference... Audi direct injection engines are notorious for carbon buildup. I yank the intake on my A4 and de-carbon the ports/valves with BG "ISC" or Induction System Cleaner. It's unbelievably nasty and softens/dissolves the carbon.
https://www.bgprod.com/catalog/gasol...ystem-cleaner/ |
I have to remember this for my 2011 550 with the direct injection motor but the intakes are impossible to get to as they are on the outboard side of the V.