Unlike the 7.3 and 6.0 Powerstroke engines, the 6.4L is a common rail diesel engine. Instead of controlling fuel delivery with pressurized oil, the engine uses a high-pressure fuel pump to create very high fuel pressure and store it in the two fuel rails that directly feed the injectors. The pump is capable of creating…

The 6.4L Powerstroke engine uses a fuel injector called a Piezo stack injector. Piezo wafers expand when voltage is applied to them. Even so, the total expansion of many wafers stacked together is only a few thousandths of an inch. Instead of forcing open the fuel injector nozzle, the wafer stack is used to control…

The 6.4 Ford Powerstroke engine’s low-pressure fuel system uses a Horizontal Fuel Conditioning Module (HFCM) to pump fuel from the tank to the engine. The normal operating pressure is 3-8 psi. On the 6.4 applications, a Schrader valve test port is provided on the fuel cooler assembly. The HFCM is mounted to the driver’s side…

For Powerstroke engines, FICM repair (Fuel Injection Control Module) is an integral part to diesel maintenance.

In 2007, Dodge trucks began using the 6.7L common rail Cummins diesel turbocharger engine, which uses a Variable Geometry Turbocharger (VGT). On the 6.7L, the VGT has a patented one-piece sliding nozzle that continuously moves to vary the power of the turbine and the amount of air delivered to the engine. The movement allows turbine…