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Warming Up the Engine
Warming Up The Engine Description The engine warm-up period consists of two stages. The fuel enrichment factor (F) is higher during the first 20 seconds of operating time (S). This means that the injector opening duration is longer in section (A) of the curve.
Fuel enrichment decreases after 20 seconds in that the injector opening duration is reduced, as shown by section (B) of the curve.
