Question 1

What is the AirDog Champ and how is it different from the FPII?

Accepted Answer

The AirDog Champ is a high-pressure fuel air separator that mounts directly to the OEM secondary fuel filter head and uses the engine's existing transfer pump for fuel flow. It removes air and vapor from the high-pressure fuel supply without replacing the factory lift pump. The FPII is a complete lift pump replacement system. The Champ is ideal for trucks that want air separation without a full lift pump upgrade.

Question 2

Will the Champ work on my Cummins, Duramax, or Powerstroke?

Accepted Answer

The Champ and Champ II are designed to work with a wide range of diesel engines including Cummins, Duramax, and Powerstroke applications. The Champ II uses a spin-on design that mounts to the OEM secondary fuel filter head. Check the fitment guide on the product page to confirm compatibility with your specific engine and model year.

Question 3

What does the AirDog Champ do for my diesel engine?

Accepted Answer

The AirDog Champ removes entrained air and vapor from the high-pressure fuel supply before it reaches your injectors. This improves injection timing accuracy, increases power output, smooths idle quality, improves fuel economy, and extends injector life by ensuring only pure liquid diesel flows through the high-pressure system.

Question 4

What is the difference between the Champ and the Champ II?

Accepted Answer

The Champ II features a spin-on design that mounts directly to the OEM secondary fuel filter head, making installation straightforward without custom mounting. Both systems use the engine's existing transfer pump and remove air and vapor from the high-pressure fuel circuit, but the Champ II's spin-on configuration simplifies the installation process.

Question 5

Do I still need the Champ if my truck runs fine?

Accepted Answer

Air and vapor in diesel fuel cause problems that are not always immediately obvious, including subtle power loss, slightly reduced fuel economy, inconsistent idle, and accelerated injector wear. Installing the Champ is a preventive measure that protects expensive injection components and keeps the engine running at factory-designed efficiency, even if you have not noticed obvious symptoms yet.

Question 6

What are the symptoms of air in my diesel fuel system?

Accepted Answer

Common symptoms of air in a diesel fuel system include rough or inconsistent idle, loss of power, increased fuel consumption, hard starting, excessive exhaust smoke, and premature injector failure. If you are experiencing any of these issues, air or vapor contamination in the fuel system is a likely contributing factor.

Weight	1 lbs
Dimensions	11 × 5 × 5 in

CALL US

QUESTIONS?

ShineABull

Description

Additional information

Reviews

ShineABull

Description

Additional information

Reviews

Related products

BlastABull Odor Eliminator

FreeABull

CureABull

GreaseABull

From February 2nd-13th, 2026! Use Code FILTER26 for 20% Off your purchase plus free shipping on all orders over $200!

* Free shipping over $200 applies to lower 48 United States only

From 3/26/26 until 4/3/26! Use Code mATS26 at checkout for 20% Off your purchase plus free shipping on orders over $200!