|
Despite what you have been told by an expert, pickups and also crankshaft position sensors do fail intermittently. This is usually brought on by rising heat. After the engine has cooled down the sensor/pickup will function again.
Yours is not a heating problem, but rather affected by increasing revs. In my mind I don't see why a weak pickup would fail to see the trigger as it sped up.
I know that it interrupts a field, but not what is producing the field. If it is the sensor then replacing it should restore the field, but if it is the trigger, then that should be suspected.. Unless of course the trigger is common to both pickups?
A high resistance connection somewhere in line between the pickup and igniter might cause this problem, especially if the current decreases with revolutions.
Or maybe just the subtle increase in vibration could jiggle a connection out of contact?
I'm sure that the pulse from the pickup is quite a low current? So wouldn't put up with much interference?
__________________
|