There is no reliable way to identify which sensor is bad when you have a no-start unless you measure them as described.
If a resistance test fails with an open or you measure see any resistance from shield to the signal wires the sensor is bad. But there instances where a sensor ohms out fine and still isn't working properly.
If you have access to an oscilloscope you can see the waveforms of the sensor signals. Even a cheap 30$ version suffices here.
That leaves cases where old insulation can draw moisture into the COAX degrading signals and sensors that fail under temperature due to internal issues.
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Originally Posted by pistolpete
Thank You for the response, For the problem that I described which one would you figure went bad? Speed or crank? I have one sensor on the way and have another one coming. But trying to narrow it down first?
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