I changed my fuel filter for the first time today. I opened the water drain petcock then removed the filter. New filter went in, new o-ring ob (fit snugly), then did 4 KOEO cycles of letting the fuel pump run until it shut off. I chose 4 because it’s double what the manual recommends and I’m paranoid about the cp4.2. The fuel pump ran for roughly the same length of time on KOEO cycles 2-4. After that, three times of starting it up and letting it run began with an extended crank of roughly triple the time it normally takes to crank. When it was idling, I had ~3900psi in the fuel rails. I don’t know why this extended crank would happen. Oh, and no leaks from the filter assembly after install. Anyone have any insight?