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injection pulse snapshot
knock sensor are wired in parallel and connected to the scope ch 1. Trigger level was set to trigger on #1 injection. 
Note first #1 at 20msec, and...
Two junk yard GM knock sensors clamp the injection line between them.
I can see the pulse from #1 injection line and then 3 small pulses from the other cylinders and then the big pulse from #1 again. I am getting about...

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