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Things to Know About the Low-Pressure Pump in Common Rail Systems

Model: (Various brands) Various
Part: Pump

Video tutorial

What do we need to know about the low-pressure pump in a common rail engine? Its main function is to draw diesel from the tank and then send it to the filter and the high-pressure pump, as well as to detect the diesel level; in fact, it also has a float function.

Common issues include dirt accumulation in the tank, filter clogging, and of course, wear.

As recommended in the video, it is a good idea to clean the pump every 2 years, especially since it is usually easily accessible by removing the rear seat. The cleaning operation is straightforward and takes no more than a couple of hours.

A malfunctioning low-pressure pump can cause power loss, misfiring, damage to the high-pressure pump, and increased fuel consumption.


Posted on 20 April 2026 by ScegliAuto


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