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Message: [QUOTE="Tiha, post: 1560760, member: 33189"] Pulled and checked LP rail sensors last night. Dry no leaks. I pulled the return, Interesting, I am reading the high pressure rail pressure. with Zero system pressure it would bounce from 42 to 0 constantly. So I am now wondering about the pressure sensor and pressure control on the High pressure rail. Anyway, ran a bunch of fuel out, No air, no metal shavings. pinched the return line and pressure went from 42 up to 96. That is good enough for me to believe the lpfp is working correctly. I am going to pull the filters and cut them apart. If I don't find anything I am going to put it back together and run it more. I took video of it starting with fuel return pinched off. Starts pretty decent. I think it starts better. Also took video of my 16 starting to compare. Start up was very similar, guys at work are laughing at me that I would complain about the difference. LOL But what I was trying to show them was the 14 does not crank as fast as the 16. Actually starting to question the starter itself. It is 2 years old now. Reman from advance. I need to video it when it get it all back together without the return pinched off so I can compare. Video doesn't lie, No emotion or feeling in it. Maybe all of this hassle has been a bad starter. Hope so, but at least I will know I am not going to get stranded with a bad CP4 yet. And really I have the forscan app but I need to get enginuity or Forscan for laptop so I can see more PIDs We had stopped for fuel in Texas last saturday. It was like 99 degrees, by the time we left the truck probably sat 20 minutes. So everything was heat soaked, starter, fuel system. That startup was the longest crank I have ever had. I thought this was it, this was the time it won't start on the first try, or at all. Wish I had a video of that one. Hot fuel, weak pump made sense in that scenario, but now looking back, so does a heat soaked starter. [/QUOTE]