The first time, the blue one stumped me. I was at my buddy's warehouse on a holiday weekend ... so I didn't want to risk it without finding the EXACT trick to releasing it. Also, when reinstalling, make sure the blue lock is fully released (it may accidentally get pushed back into the lock position while manhandling that HPFP line ... ask how I know)?That blue one is a real hassle to first figure out.
You can bump the starter, but make sure lines are still hooked up or turn engine with crank bolt.
If you let the truck sit an hour, there is barely any fuel that comes out. This time i did it literally after shutting it off, the low side poured some more than first time(just put paper towel under) but the High pressure side....well it is is high pressure, lol. I cracked it and the pressure was puffing out. I was like damn! Kept slowly doing it.
The bolts I just tightened down, no tq wrench. The one thing they say is to tighten actual top two pump bolts 1 turn at a time each side until tight.
I did leave the lines connected when "bumping" the starter. I had already drained the lines and still had fuse #27 pulled, until I bumped the starter to get the roller at the base circle. When I pull the HPFP line off, it was mostly air with a few drops of fuel.
I learnt the trick (pulling the Fuel Pump Relay fuse) on previous fuel injected vehicles that had external filters in the fuel line. It was the best way to minimize the amount of fuel that poured out when I removed the fuel filter.
I am still using the oem designed returnless system. But @Blown F-150 is slowly convincing me to convert to a return type. Then I could have an external fuel filter plus put an adjustable Fuel Pressure Regulator for the Low Pressure Side so I could use it that to help the HPFP (still at 35). Just need to add a Schrader Valve and I can use my old Fuel Pressure Gauge. AND ... an Ethanol Sensor as I am now adding E85 to my fuel. (That is what got me into upgrading my fuel system, even though I don't have my GTs/CRP Manifold installed yet.
BTW, have you changed your Injectors? I ask this, because I have heard that the OEM injectors don't like too much pressure. Just curious about your experience.
I will have to spend some time to go through all your posts here. Probably in reverse order so I can see where you are now.