Isuzu diesel long crank start, no start, running rough EASY FIX DIY crankshaft position sensor issue

This 2012 Isuzu with a 4JJ1 Diesel was long cranking to start and would run rough intermittently. The customer replaced the crankshaft position sensor and the ECM. Still had the same issue... what I found was a super easy fix, could have saved thousands... This video is to help others who are experiencing the same thing. Save you money and DIY!