Recommended Procedure
WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The compression pulses in the latex balloon indicate the combustion gas is leaking into the fuel rail.
NOTE:
Additional DTCs may result during this procedure.
- Disconnect the low pressure fuel pump electrical connector.
- Disconnect the fuel injector return line at the check valve located near the left cylinder head. Refer to FUEL SYSTEM - GENERAL INFORMATION - GASOLINE AND DIESEL -- F-250-550 (SUPER DUTY PICKUPS) .
- Install a latex balloon over the fuel return line and secure with a tie strap.
- Remove the glow plugs from cylinder numbers 2 through 8, leaving the cylinder number 1 glow plug installed. Crank the engine and observe the latex balloon for compression pulses. Refer to GLOW PLUG SYSTEM -- F-250-550 (SUPER DUTY PICKUPS) .
- If no compression pulses are present, remove the cylinder number 1 glow plug and install the glow plug in cylinder number 2. Crank the engine and observe the latex balloon for compression pulses.
- Repeat the test moving the glow plug to cylinder numbers 3 through 8 and continue testing all cylinders. Record the cylinder numbers that indicate compression pulses in the latex balloon.
- For cylinders that leak combustion gas into the fuel return line as indicated by compression pulses in the latex balloon, remove the injector and install new O-rings, combustion gasket and fuel injector hold down clamp assemblies. Refer to FUEL SYSTEM - GENERAL INFORMATION - GASOLINE AND DIESEL -- F-250-550 (SUPER DUTY PICKUPS) .
Carry out the Combustion Gas In The Fuel Rail Test to verify the repair.