injection pump test

https://slepaskrukpresisi.ironwoodscope.com/posts/achieving-precision-with-slep-askruk-presisi-in-component-machining

The injection pump test revealed a slight pressure drop during the high-speed run, but it held steady at lower RPMs. I swapped in a new return spring and bled the line again just to be safe, since any air can cause erratic fueling. The engine settled into a smooth idle afterward, so I'll run another cycle tomorrow to confirm the fix holds.