Left Cylinder Head Check

WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: In the following steps, engine may start.

Remove the left valve cover. See appropriate article in ENGINES. 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 plug into the high pressure hose. Crank the engine and monitor the ICP PID. If the ICP/EBP 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.

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.