Does anybody know if I can run the 6.7L Cummins with the valve cover off and do a visual like Wits 5.9 video?
If the problem is intermittent, did you make sure you don't also have an actual issue with the Fuel Rail Pressure Sensor or wiring, and the fuel pressure is just defaulting to some higher than normal level?
Thought I recall in the video of the 5.9 leak the guy unplugged or jumped the FRP connector to intentionally create a higher than normal fuel rail pressure in order to see the injector leakage better.
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