
- Water Separation: Fuel passes through a water separator, which removes all water and large particulate contaminants.
- Fuel Pump: The fuel then reaches the pump, which pressurizes it for the next stage.
- Filtration: Under positive pressure, the fuel flows through a filter that traps any remaining minute particles.
- Air/Vapor Removal: Simultaneously, any entrained air and vapor are separated from the fuel and returned to the tank.
- 100 GPH Fuel Pump: Provides the robust fuel flow required for your stock or moderately modified engine.
- Removes Air & Water: Protects your injectors and other fuel system components from long-term damage.
- Increases Engine Efficiency: Leads to a faster throttle response and overall optimized engine performance.
- Reliable 4G Motor Design: This proven motor ensures a long-lasting, cost-effective solution.
- Lifetime Limited Warranty: AirDog stands behind this product with a comprehensive limited lifetime warranty for complete peace of mind.
- Complete Kit: Comes with all the necessary plumbing, hardware, wiring, and mounting brackets for a straightforward installation.

For owners of a 1994-1998 Dodge 5.9L 12V Diesel, especially those with stock to moderately modified engines, a high-quality fuel system is the key to both performance and longevity. The AirDog A4SPBD100 FP-100-4G Air/Fuel Separation System is the perfect upgrade. As you demand more from your engine, higher fuel flows can introduce damaging air and vapor into your system. This not only robs your engine of power but can also permanently damage your injectors, causing issues like pitting, galling, and tip erosion. The AirDog system actively removes these contaminants, ensuring your engine gets the clean, consistent fuel supply it needs to perform at its peak.
How It Works
The AirDog operates as a comprehensive lift pump and filtration system, pulling fuel from your tank and putting it through a multi-stage process:
Water Separation: Fuel passes through a water separator, which removes all water and large particulate contaminants.
Fuel Pump: The fuel then reaches the pump, which pressurizes it for the next stage.
Filtration: Under positive pressure, the fuel flows through a filter that traps any remaining minute particles.
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- Water Separation: Fuel passes through a water separator, which removes all water and large particulate contaminants.
- Fuel Pump: The fuel then reaches the pump, which pressurizes it for the next stage.
- Filtration: Under positive pressure, the fuel flows through a filter that traps any remaining minute particles.
- Air/Vapor Removal: Simultaneously, any entrained air and vapor are separated from the fuel and returned to the tank.
- 100 GPH Fuel Pump: Provides the robust fuel flow required for your stock or moderately modified engine.
- Removes Air & Water: Protects your injectors and other fuel system components from long-term damage.
- Increases Engine Efficiency: Leads to a faster throttle response and overall optimized engine performance.
- Reliable 4G Motor Design: This proven motor ensures a long-lasting, cost-effective solution.
- Lifetime Limited Warranty: AirDog stands behind this product with a comprehensive limited lifetime warranty for complete peace of mind.
- Complete Kit: Comes with all the necessary plumbing, hardware, wiring, and mounting brackets for a straightforward installation.