P-Pumped Powerstroke?
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Joined: Feb 2008
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From: Lubbock, Texas
Essentially the difference (as I understand it) is that a P-Pump is a piston pump that pressurizes the fuel into lines that lead to mechanical injectors that "pop off" at a certain pressure and spray the fuel into the cylinder. A common rail system uses a pump (or two pumps) to pressurize the fuel into a common fuel rail (or gallery) and then the injectors are electronically operated to control the timing and duration of the injection cycle. Essentially a P-pump is a mechanical fuel injection system, a common rail system is all electronic and the injectors are basically just little solenoid valves that open and close to spray the fuel.
Here are some articles that describe the processes in better detail.
Bosch P-Pump Fuel Injection - Diesel Tech - Diesel Power Magazine
Common rail - Wikipedia, the free encyclopedia
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superduty4x4
1999 - 2003 7.3L Power Stroke Diesel
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Apr 20, 2009 10:53 AM
