my car keep going way lean in 4th gear @ 4000rpm and 10psi. since my SAFC can't be used to richen it, do i need to raise my fuel pressure and lean it out at the other rpms? any help would be appreciated.

dsm/mitsubishi service manuals https://www.mediafire.com/folder/5k14qlaulb9s1/dsm_mitsubishi

service manuals(my whole collection) https://www.mediafire.com/folder/ac51jwwa3g1n1/automotive_manuals