2009 prostar isx crankshaft sensor issue

[Zmcd]

(01-01-2025 )DVT873 Wrote:  Not an issue!?!! If the tone ring is missing teeth it will sure as hell cause problems. If there was rust or corrosion under the sensor tab and they didn't clean it up that will cause problems also. Like rust-jacking on brake shoes it pushes up on the sensor forcing the tip of the sensor away from the tone ring. On mid-range Nav engines, the maximum clearance is .070. Beyond that, the signal starts going to hell, to the point it won't start. I don't know what it is for Cummins but I would expect it to be a similar clearance.

If you can find somebody who can use an oscilloscope they can look at your sensor signal. Dam few truck mechanics will know how to do that but a good hotshot automotive guy will. They scope cam and crank sensors a lot.

It’s definitely drilled thru, looks like teeth were drilled thru on the corners and the edges were chipped off. Gonna have to look into swapping the tone ring.