Left Cylinder Head Check (F-Super Duty/Excursion - Early Build)

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2004 Ford RV Cutaway, 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

Remove the LH valve cover. For additional information, refer to the appropriate ENGINE article. Remove the cap and plug, then reinstall the high pressure hose to the right oil manifold. Remove the high pressure hose from the left oil manifold using Quick Disconnect Tool 303-755, and cover the fitting on the oil manifold. Install 303-756 into the high pressure hose. Crank the engine and monitor the ICP PID. If the ICP/EBC Adapter Cable D94T-50-A is connected to the ICP sensor, connect a digital multimeter between the signal return and ICP signal wires of the adapter cable. Crank the engine and monitor the signal. The digital multimeter should read 1 to 4 volts.

CAUTION: The engine may start.

If the engine starts or if injection control pressure is now within specification, the injection control pressure leak has been isolated to the left cylinder head.