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Fixed.
The culprit? a 2-pin 100-mil jumper header i clipped out of an old ethernet card to plug my VSS & Inj inputs into. You'd think the 2 contacts would be "open", but it turns out there were about 700k ohms connecting them. No es bueno, as they say in Spain.
No more spurious Inj readings. RPM is off by x2. Let's roll this puppy!
If anyone's interested, i added a "Throwaway Too-Big Pulses" feature to processInjOpen/Closed in attempt to hack a software fix. It helped a little, though fixing my wiring was ultimately necessary. I'll post the code on the Workspace One page.
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