Stock GC8, ej20 sti
Trying to trouble shoot an intermittent (I suspect fuel) running problem. It doesn't start as fast as it should, stalls at idle sometimes and will occasionally cut/die at cruising revs.
What's been done, new fuel filter, new plugs and coil packs, cleaned the maf, vacuum hoses checked for leaks, run fault codes, maf and boost solenoid was the only things to show before Icleaned it, and i suspect they are old ones thar weren't cleared, as factory boost control was disconnected by the shop (they are mentioned on here as reputable) that installed the fmic and manual controller for the previous owner.
Have also run some injector cleaner through a couple of tanks of 98.
Should I be looking at, and in what order
Injectors
Fuel pressure reg
Fuel pump
Something else???

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Knew better, but did it anyway

Fuel Pump , Fuel filter ,

I was thinking pump next but because it's still keeping fuel up in the revs on boost, has me confused
I'll track down/order a new pump and tick that off the list then
Cheers

__________________
Knew better, but did it anyway

New pump go a walbro 255lph from Stechnic , Vision r etc about 160 bucks off the top of my head

Check charge voltage, (should be 13.8-14.4v)
Check fuel pump supply voltage, with and without lights and heater on.

May have a bad wire or relay, My GF8 had heaps of wiring faults, broken wires, bad plugs, water contaminated relays and control systems.

Check fuel flow and pressure..