In response to how the timing works I'm sure somone could explain it better than me but... There is a timing piston the lies perpendicular to the rest of the pump drive direction. The cold start lever moves the piston slightly from one side of the pump to the other which inturn rotates the cam plate within the pump housing. This inturn advances or retards the plunger strokes changing when the injection lines are pressured thus making happen earlier in in the other direction later.
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