Diesel Fuel Filtration

Do you notice a rough idle or hesitant pull from your diesel? Air and contaminants in the fuel can be part of the explanation. Here we gather systems that filter the diesel and separate air before it reaches the injection pump. They are for you with a Chevrolet Duramax or Dodge/RAM Cummins.

What does an air separation system do?

A system like AirDog sits between the tank and the engine's injection system and typically works as a lift pump with built-in filtration. Air and vapour bubbles are separated from the fuel and can be returned to the tank, giving the injection pump a more consistent supply. This can provide more stable operation and protect the components, but the effect depends on the vehicle's condition and the rest of the setup. If you are looking at the entire diesel system, you will find more parts under diesel specialty parts.

How to choose the right system

Fitment depends on engine and model year, and this is shown in the product names, e.g. 01-10 Chevrolet 6.6L Duramax, 11-14 Chevrolet 6.6L Duramax and 04.5-24 Dodge/RAM 24V 6.7L Cummins. Then choose based on:

• Model and capacity – the series is available in several versions, e.g. FP-100-4G, FP-150-4G and DF-220-5G. The capacity should match your power target and any upgrades to injection components.
• Generation – both 4G and II-5G models are available. Check the specifications for the specific part number.
• Space and mounting – location, hoses and electrical connection must fit into your project.

Installation and maintenance

Installation typically requires work on fuel lines and wiring. Follow the instructions carefully and check for leaks afterwards. The filter elements must be replaced at regular intervals, and the interval depends on fuel quality and driving. You will find the full range under AirDog.

Frequently asked questions

How do I know which AirDog system fits my engine?

Look at the engine and model year in the product name, e.g. 01-10 Chevrolet 6.6L Duramax or 89-93 Dodge 12V 5.9L Cummins. Then check the specifications for the specific part number before you order.

Should the capacity match the engine's power?

The capacity should be matched to the power target and any upgrades to injectors or the injection pump. More capacity than needed does not in itself give more performance, so choose based on the entire setup.

How often should the filters be replaced?

It depends on fuel quality, driving pattern and the instructions for the specific system. Feel free to replace them earlier if you notice signs of clogging, e.g. dropping fuel pressure or hesitant pull.