Replaced all 6 injectors, now leak test still fails

[race7820000]

Guess I should have read this thread lol my engine same year, same symptoms. Havent pulled the valve cover yet but it has 1,070,000 miles......head has never been off.
The engine brake has 3 levels, when u go from level 2 to 3 the tone changed a little but it doesn't feel any different.
Has vibrating at higher rpm
Idles ok, it's smoothish, but isnt quite right.
Seems like it loses power in higher gear.
Passed cutout and pressure test for injectors