What I did was to remove one of the injector-FD lines, use a tight-fit rubber hose to connect the FD end flare to my pressure-testing rig, secure with a hose clamp, then screw on the injector.

Steve

__________________
'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7