Diesel Specialty Parts

Is your engine management reporting rail pressure faults, or do you want cleaner fuel reaching the injectors? In this category we bring together parts for diesel engine injection and fuel cleaning – from pressure sensors and metering valves to remanufactured pumps and systems that separate air from the fuel.

What the parts in the injection system do

A common rail diesel engine depends on pressure and fuel quantity being precisely controlled. The rail pressure sensor reports the pressure to the engine management, and the metering valve (FCA/MPROP) regulates how much fuel the high-pressure pump receives. Among diesel fuel injection components you will find, for example, rail pressure sensors and improved OE metering valves from Exergy as well as remanufactured injection pumps from Industrial Injection. A faulty sensor or valve can cause rough idle, loss of power or fault codes, but always diagnose before replacing parts.

How to choose a sensor, valve or pump

• Measuring range: rail pressure sensors come in different ranges, e.g. 0-2200, 0-2400 and 0-2700 bar, and the sensor must match what the engine management expects.
• Engine and model year: many parts are tied to a specific engine, e.g. Chevrolet Duramax 6.6L LML, Ford Power Stroke 6.7L or Dodge Cummins 6.7L.
• Connector and wiring harness: check whether the sensor comes with a connector and whether it fits the vehicle's wiring harness.
• Power goals: a build with more power can place different demands on the pump and fuel supply than a stock engine.

Fuel filtration and air separation

Air and contaminants in diesel fuel can put strain on the pump and injectors. Under diesel fuel filtration kits you will find, for example, the PureFlow AirDog Fuel Air Separation System in the FP-100-4G and FP-150-4G versions for Chevrolet Duramax and Dodge/RAM Cummins, among others. The choice of version depends on the engine's fuel demand and your power goals, so compare the specifications. Filter elements must be replaced according to the manufacturer's instructions. If you need to upgrade the supply further, also see fuel pumps and regulators.

Frequently asked questions

How do I know which measuring range my rail pressure sensor should have?

It depends on the engine and engine management. Choose the measuring range that matches your engine and model year, and check the part number against the original sensor. A sensor with the wrong range can give incorrect pressure readings and fault codes.

What is the difference between a metering valve and a rail pressure sensor?

The rail pressure sensor measures the pressure in the rail and sends the signal to the engine management. The metering valve regulates how much fuel is fed into the high-pressure pump. Faults in either can cause similar symptoms, so diagnose before replacing.

Why separate air from diesel fuel?

Air in the fuel can cause an uneven supply to the pump and injectors and can affect the lubrication of the injection components. An air separation system removes the air before the fuel reaches the engine. The effect depends on the system and the installation.

Can I install the parts myself?

It depends on the part. A sensor can typically be replaced with ordinary tools, while an injection pump or a filter system requires more experience. Work cleanly, as dirt in the high-pressure system can damage the pump and injectors, and follow the installation instructions.