Right 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.

WARNING: Oil is under high pressure.

Remove the right valve cover. See appropriate article in ENGINES. Remove the high pressure hose from the right oil manifold using Quick Disconnect Tool (303-755), and cover the fitting on the oil manifold. Install the plug from the Oil High Pressure Leakage Test Adapter Set (303-756) into the high pressure hose to block it off. See Fig 1. Crank the engine and monitor the ICP PID. If the ICP Adapter Cable (D94T-50-A) is connected to the ICP sensor, connect a digital multimeter between signal return and ICP signal wires on 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 right cylinder head.

Fig 1: Installing Plug In High Pressure Oil Hose

Courtesy of FORD MOTOR CO.