AirDog II-4G (A6SABC409) Duramax 165GPH Fuel/Air Separation System (01-10)

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AirDog II-4G Fuel/Air Separation System Featuring Demand Flow Technology & Enhanced Features

The Duramax is probably the most responsive diesel engine to an aftermarket lift pump. From the factory, the GMC and Chevy Duramax pick-up trucks don’t have a lift pump to supply fuel to the engine, the CP3 injection pump is the truck’s only means of getting fuel from the tank to the injection system. If you were to look at AirDog’s video of “How the AirDog works” it will show you what happens when the CP3 pump pulls fuel from the tank to the engine; the fuel is under constant suction which causes cavitation and excessive wear & tear on injectors and your injection pump. This is the #1 cause of low rail pressure codes when adding aftermarket programmers or tuners that increase the demand for fuel. By providing both constant positive fuel pressure and 100% pure fuel to the engine, an AirDog fuel system will open up the added benefits of smoother and quieter idle, better throttle response, increased fuel economy, better mid-range through top end power and more consistent rail pressure to support both stock and modified engines.

The AirDog II-4G is an improvement on the older AirDog II Fuel System technology, accomplishing everything its predecessor did with the addition of a quieter, more efficient, and more reliable motor to give your truck on edge on the street and on the strip. AirDog II-4G also overcomes loss of power for diesel engines operating at higher altitudes

The AirDog II Fuel Air Separation System works by removing various contaminates, including entrained air/vapor, particulates & moisture, & removes excess fuel not needed by engines, allowing the fuel to flow through the regulator and return to the fuel tank. The separated air/vapor enters the return port after the regulator, allowing pure fuel to flow to the engine at a regulated positive pressure. A gerotor pump offers quiet, long lasting performance for your application. AirDog II-4G features Demand Flow Technology & an Adjustable Regulator that lets you fine tune your fuel system for even further increased fuel economy, power, and performance. Get the most our of your diesel truck and ahead of the competition by installing an AirDog II-4G Fuel/Air Separation System on your truck.

HOW IT WORKS:

AirDog® II-4G is designed to operate at flows and pressures beyond the maximum requirements of the engine. It receives fuel under vacuum from the fuel tank containing entrained air/vapor, particulate contaminates and unknown quantities of water.

The fuel passes through the water separator which removes the large particulate contaminates that could damage or jam the gear rotor fuel pump. The fuel, with only entrained air/vapor and tiny particulate contaminates remaining enters the fuel pump.

The fuel, now under positive pressure flow, enters the fuel filter. As the fuel passes through the filter media and the remaining particulate contaminates are caught and contained, the entrained air/vapor is also separated. Through the positive fuel air separation features of the patented AirDog® II-4G the separated air/vapor is discharged from the filter and back to the fuel tank through the Primary Air/Vapor Discharge Port.

The fuel passing through the filter media is now free of contaminates and power robbing air/vapor. At pressures and flows able to meet the needs of the engine, it exits the fuel filter through two passageways. First, the fuel for the engine passes into the fuel pickup tube and on to the engine. Then, the excess fuel not needed by the engine recycles internally through the pressure regulator back to the water separator.

INSTALLATION MANUAL