The last pic shows the relationship between the crank pulse and the start of the fuel pulse. Not that the fuel pulse always starts at the same place, around 500-600us after the falling edge of the crank signal, regardless of RPM or load. The width is varied by changing the end point of the pulse.
Here's a slightly dubious pic of some of the traces stitched together (if only I had a 4-channel scope!):
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