At 65 mph strong then 0 oil pressure immediately

I removed the engine positions sensor (AKA engine speed sensor there are two on my truck) and the one at cam location had a broken tip with wire receptiors all freyed and strung out, the tips are made of plastic with a tiny metal receptor. After replacing that my truck now starts quickly and normal (like 1-2 seconds of cranking) whereas it was taking 4-7 full seconds of cranking before it would start with the broken tip engine speed/position sensor.... But my truck still does the randomly start running choppy after 20 minutes or 50 or sometimes not for a whole 2 hours. I turn the truck off crank it back and it runs normal and then starts running choppy later. repeat.