Normal for gDI to have thisbruker said:Has anyone else here noticed a heavy deposit of soot or carbon on the tail pipes? I have a `10 V6 and it make me wonder if the engine is burning too rich. Anyone?
Haider, GM’s V6 assistant chief engineer, explained how GM has designed its DI engines to combat carbon buildup: “We maintain great engine function and performance in our all our DI engines through an optimization strategy with our valve events,” he said. “Our intake-cam timing, injector targeting and timing of the injection events are optimized to avoid direct fuel contact on the intake valves. This strategy keeps smoke and soot formation to an absolute minimum, which in turn prevents excessive deposit formation.”