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2nd gens just got the one injection right before tdc. I was mistaken and thought you were talking about the pilot injection on the 3rd gen. So the smarty advances the timing of the second injection closer to tdc?
I imagine that the oil stayed a lot cleaner without that 3rd injection though. Did they extend the duration of the 2nd injection or just remove the 3rd completely?
the 03-04.4's only had two injections and yes the oil stayed alot cleaner. . .the 3rd injection event is mostly for emissions to heat up the cat to reduce NOx.