Where did you get the NEW hall effect switch? If from Autozone, Advance or O'Reilly, THAT could be the issue. Having worked for 2 of the 3 mentioned places, I saw quite a few of those come back to the store as defective. I'd recommend an OEM Mopar one if you can still get one. I'm NOT a mechanic, but it seems like you should be getting spark with all of the other things you've tried. You don't mention trying another hall effect switch.