The Pureflow AirDog II 5G 1 00GPH A7SPBD338 lift pump, or Fuel Preporator, is a must have upgrade for your 1989-1993 12V 5.9L Cummins. The fuel system on your Cummins mechanical or common rail, is the heart of the vehicle’s performance and reliability. This low pressure (preset at 10-13 psi) Cummins lift pump mounts to the inner frame rail using the supplied sandwich plate mounting system. The suction/fuel supply side connects directly up to the factory suction lines on the fuel module.  The pressure side connects directly to the side of the VE-44 injection pump bypassing the block mounted mechanical factory pump and fuel filter housing.

The II-5G Cummins fuel pump features a fully adjustable (7-55psi) integrated diaphragm pressure regulator. This regulator offers more consistent fuel pressure and allows for higher flow rates at pressure.  It can also be boost compensated to battle any pressure drops under open throttle (boost compensation kits sold seperately). The AirDog 5G also includes an updated 12 gauge wiring harness with Metri-Pack 280 connectors, which allows for higher current flow without creating excessive heat.

The AirDog 2 5G DF-100 Cummins lift pump will solve the infamous P0087 & P1093 low fuel rail pressure codes. This positive supply of purified fuel being fed to your injection pump will also add performance, throttle response, and longevity to your vehicle. Due to extra stress on your fuel system from either high mileage and/or additional performance modifications, like a tuner or larger injectors, your injection pump can become weak over time. This may result in a drop of performance, reliability, and fuel economy. The supplied water separator (WS100) and fuel filter (FF100-2), that mount to the pump, filter your fuel down to a 2 micron rating which surpasses the stock fuel filters filtration capability. (see How It Works)

This AirDog II-5G 100GPH Cummins lift pump is recommended for trucks that have a stock to a mildly upgraded fuel system (meaning mild or stock injectors, injection pump, and tuning). See How To Choose A Lift Pump. Backed by a lifetime warranty.

The AirDog II-5G DF-100 for the 89-93 Cummins is engineered with the most proven, quiet and reliable motor technology on the market.  It also retains the “demand flow” capabilties of the previous AirDog II systems.  This means that is has a constant supply of clean, pure fuel available for your injector pump at all times.  Any fuel not used by the engine is simply recycled back to the tank, so it will never “over-fuel” your system.  The II-5G A7SPBD338 uses the same better-than-OEM fuel filter (FF100-2) and water separator (WS100) as the previous AirDog II models.  Pureflow AirDog products are manufactured in Shelbyville, Indiana by a team of skilled workers with unsurpassed attention to detail and using the most stringent quality assurance.

Benefits of the 5G Fuel System

  • Improved Throttle Response
  • Longer Injection System Life
  • Increased Power and Torque
  • Reduced Exhaust Emissions
  • Adjustable Diaphragm Fuel Pressure Regulator
  • Boost Compensation Capability
  • Quiet and Smooth Pump Operation

The AirDog 5G offers features to make it more durable than any other brushed DC motor system on the market!

AirDog ® II-5G Installation for Most Any Skill Level

The installation of any AirDog II system has been designed with the customer in mind. They know not everyone has special tools or fabrication skills, so the installation was made as easy as possible with basic hand tools and the occasional power drill. The quick-connect fittings and fuel lines make this a true plug and go installation, reducing the overall installation time. The step-by-step manual outlines each process of the installation and is accompanied by visual guides to aid your progress.

All-Inclusive Installation Kit Includes:

  • Relay Control Wiring Harness
  • All required Fuel Fittings
  • All Require Fuel Lines
  • Mounting Brackets and Hardware
  • Installation Manual