open back the fuel pump and check if the connecting hose inside still ok or burst pecah....
especialy if the hose wasnt replaced using the supplied new hose.....and in addition, that hose not same as normal fuel hose bought at sparepart shop....not compatible....
last time while im troubleshooting of my forester fuelling problem, using that normal hose, after 1 week the hose almost torn apart...luckily i'checked back...
now running aeromotive stealth 340lph fuel pump....silent yet very good flow...
last time using walbro...noisy,unstable pressure when hot....same goes to walbro in my rally car...almost didnt finish the rally recently in johor due to that alone...