I believe that the plunger is the leaking spot. Does that mean new pump?
Dose that mean a new a new pump ??? "Wasn't my idea to use the stimulus check that way. Good chance it's seen better days" OLD JOE.
IMO... yep got one, LOL....... For all that trouble, pull the pump and lines and have it rebuilt. Using a reliable rebuilder ?? one could ?? eliminate further IP issues. Not saying can't be done and I have done crazier, but at this point remove, rebuild and relax till the next problem.
While waiting for the return, one could clean up other loose ends... ie return lines, delivery lines, throttle components, air intake, fuel filter, thermostat, etc.
I get it that one wants rig "up and running" and the "time and money" thing. The IP pump sure can be the money pit to getting back on the road. There's a lot of precision, calibration and other wear items inside.
Either way... ones going to get a little dirty.
More money, soap and water, CAMO