Walnut shell carbon blasting....
Hi guys, does anyone know of a shop that does this (I'm in west end)? My 09 335 has been having issues for several months. Misfiring, CEL and Engine Malfunction errors. Dealer first said it was leaky injectors and replaced three (I'm at 97k so no more warranty but they did it free due to the large number of service issues I've had). Started right back up a few weeks later and now they say it's carbon build up and it's 1500 to clean.