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: If the engine does not start during this procedure verify the batteries are fully charged, plug in the block heater and cycle the key several times to activate the glow plugs.

This test identifies non-contributing power cylinders and determines if the injectors are operating correctly.

Turn off all accessories. If the vehicle is equipped with a PTO system or auxiliary idle control, it must be turned off to carry out the Power Balance test.
Refer to the scan tool operating article for instructions.
Key in OFF position.
Key ON, engine running.
Start the Power Balance test and monitor the cylinder power contribution for 8 seconds. Identify and record the non-contributing power cylinders.
While the Power Balance test is running, use the output state control (OSC) to turn off the idle compensation strategy. Monitor power contribution for 8 seconds, identify and record the non-contributing power cylinders.
With the idle compensation strategy turned off, increase the engine speed to between 800 and 900 RPM. Monitor power contribution for 8 seconds and identify and record the non-contributing power cylinders.
Install a new fuel injector for the cylinders identified as non-contributing power cylinders, refer to FUEL SYSTEM - GENERAL INFORMATION - GASOLINE AND DIESEL -- F-250-550 (SUPER DUTY PICKUPS) .