Pajero io starts only when low pressure fuel pump is disconnected

Hi, guys!

I got a Pajero io engine 4G93 GDI 1.8 that cranks but starts only when low pressure fuel pump is electrically disconnected or when its hose is disattached from the circuit that sends fuel to the high pressure fuel pump. There's no dtc's and all sensors data looks ok in live data through my scanner.

There's no air flow restrictions as I initially guessed. EGR has been deleted long ago so intake and intake valves are pretty much clean.

Any ideas? Has someone experienced something like this?

TIA