‘68 Case 580CK injector pump open inlet test fail

Ok, fun day! started with trying to do the 'suck test' (see vid). I popped of the inlet line and loosened the 4 screws in the inlet cover first just to make sure I could crack the loose without breaking them. Suck test did NOT work, fluid seemed to pull in when the starter was nudged, but then came back up in the inlet port and was only down maybe an 1/8" at best in 2 seconds of cranking. Open Injector Test Fail : Ne

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