Starting problem pretty much solved :(

[Martyt3x]

Hi all, just had a good cold start recording on techstream of my 1ad-ftv and sat down with a coffee and watched it for a few times and something has puzzled me, I isolated the start signal on/off engine speed and fuel pressure measuring blocks on tech stream and recorded it, I noticed the fuel pressure was at zero when I started started and went up to target while running but as soon as I switch off it plummets and goes to vertually nothing again within a minute, tried this later on and did the same reading hardly anything until running then dropping rapidly as soon as it switches off. It's looking like it will be injector/s leaking, or the fuel pressure release valve but as there's no fault codes I'm guessing it must be injector related :(