IPR and High Pressure Pump Test (F-Super Duty/Excursion - Early Build)
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If injection control pressure is still low after ruling out both cylinder heads as the source of injection control pressure leakage, perform the following steps to isolate the cause. Remove the high pressure hose from the right oil manifold and cover the fitting. Install the plug from the Oil High Pressure Leakage Test Adapter Set 303-756 into the high pressure hose to block it off. With the high pressure pump effectively deadheaded, crank the engine and monitor the ICP PID. If a low pressure condition still exists, the problem is most likely with the high pressure pump or the high pressure pump drive gear.