Air leak

[Smw]

Hi guys really need some help with his one, I’ve got a 2017 transit customs 2.0 ecoblue, I’m getting intake air leak bank 1, and underboost and a maff code coming up, upon inspection and replacing intake pipe with new one I can hear a hissing noise from around the fuel pump/ fuel rail area, I thought it might of been the pipe from rail to pump so replaced and still the same, I’ll try and attach some vids of noise and pic of codes,,