does it matter what way the crank pulley bolts on? took mine off without marking it, wondering if the sensor wants to see the window in the balancer at a certain spot for tdc ref, or if it just needs to see the speed at which it passes by.

 

Nope, doesn't matter at all. I purposefully put mine back on 90 degrees off just to test it. As far as I can tell the only thing the sensor is there for is the tach, and someone mentioned also for cruise control.

 

I should have followed up on this, I put out on both ways and out worked either way. That sensor has lots of duties. Alternator, tack, trans, cruise...it does quite a bit. But it is not a tdc ref, it is only a speed ref, so the only thing that matters is the sensors air gap.