I have a 2003 f350 with 205,000 miles. I have a long crank cold or hot doesn't matter. About 8-10 seconds. When truck starts it runs fine and the hpop will create above 3000 psi at WOT. The ipr % is between 70-80% if i can recall correctly. At idle the ipr % is 30 when cold. The screen was clean on the ipr. If I turn it off and start it up right away it starts fine but let it sit for a 1 min it has the extended long crank. The HPOP was replaced about 30,000 miles ago due to not making enough pressure causing a no start. I pressurized the system with 120psi of shop air and closed the ipr valve and the only place I hear air coming from is the oil filter housing. This is how I diagnosed the original pump being bad but it also didn't make enough pressure about 400psi. It's just bubbling sound not like a hiss or anything. I pulled the hpop off and put shop air to the top of the pump and can hear air coming out of the suction hole at the bottom of the pump. Also a little out of the front seal which I know is acceptable. Is this causing the system to leak down and causing a long crank? No air should leak back thru the pump. correct. I think the pump is bad cause it leaks down the oil but then again it still make good pressure and only 30,000 miles on it. I replaced pretty much every seal in the system and the icp sensor w/ connector (second time also). So think the pump my be the problem just can believe that yet cause of the low miles on it. Need to hear it from someone with experience. Thanks in advance.