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Message: [QUOTE="CurtisF, post: 597738, member: 829"] Just to help clarify for others as well. The tuning does not ever call for any split-shot command. There is nothing in the tuning or the IDM that actually controls if an injector fires as a single or as a split, or commands a function of a split shot. It's purely mechanical on the injector side only. The PCM itself assesses when and how long to fire based on what the tuning is commanding, and that signal is sent to the IDM, which then commands the injector to open and close at precise times. For singles or split shots, it's the same signal. The difference in tuning between split shots and single shots is..... when and how long the event is commanded. Because of the mechanical differences between splits and singles, the tuning has to be adjusted in order for the engine to idle and run smoothly when switching from one to the other. The biggest changes to that tuning is the timing and the amount of fuel delivered (the latter being adjusted far more with larger nozzles). Hopefully that's a short and simple explanation. [/QUOTE]

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