ANYWAY, the 606 is direct injection, so no pre chamber.
I don't think so!
Why is this? EGR is dumping a bunch of carbon, but did all this come about recently? With #5 dead, it has been hard to start and smoking at start about as bad as Gump. This is less than a month of hard start, so I am amazed if this results in one month.
I'm told it doesn't take long, because it's kind of a self-perpetuating process unless the majority of your driving is Italianate in nature. Probably being indirect in nature (a 6XX part number) it's a lot more sensitive to glop in the prechamber. Start with glop, and it stays that way for awhile. And once you're over the threshold, it never goes away. -- Jim
