Hey guys this is gonna be more reading and advice rather than a few pics and an easy diagnostic. Im having issues with a 1982 Toyota MK2 celica Supra. With a 5mge engine. I tore it down to bare metal and built it back up. I have many issues, but let's start with the reason it won't start. I believe I narrowed it down to fuel. It cranks but no start. Fuel issues: So I checked the psi at the pressure regulator and it did something weird it started at 37 psi(according to manual kt should be between 35-40psi)when cranking so I thought I was outta luck and went to go try something else. But after trying it about 5 times and coming back it was only at 25psi. I thought i maybe flooded it and caused something weird to happen so I let it sit for 30 mins, came back and got the 25psi reading again. So I believe it should be fuel system. Im trying to replace the fuel pump but it has to be done in a really weird way(long explanation I'm skipping) but I do know it has a small bend in the line from me, but it's very minor(could be the problem tho.) It's could be fuel filter but it's very unlikely toyota decided to put an extra large fuel filter on this car. Things I've checked: Sparks, Distributor, coil ignition assembly, and air intake system. All was in order. Could the fuel pump be causing this? Pretty sure it's the stock one but it ran good 2 years ago before I tore it all down. So possibly? Maybe the small bend? Fuel filter? I just need ideas, hell maybe even new ideas and none of the above! It is getting proper voltage at the fuel filter, about 12V.

TLDR: Could 25psi(OEM should be 35-40psi) fuel pressure cause a crank but no start situation?