2008-2010 F250 & F350 Fuel Separators

So What Exactly Does a Fuel Separator Do?

Short answer: they proactively eliminate contaminants to feed your injectors a purer, more consistent fuel supply. If you're wondering how it does that, read on for the long answer. It all comes down to maintaining healthy fuel pressure and filtration under heavy application. When you're in cruise control on a city highway, your stock fuel pump shouldn't have a problem with this. However, under any sort of heavy application such as towing or off-roading, you need a fuel system that proactively eliminates contaminants to feed your injectors a purer, more consistent fuel supply. When you're bumping over rough terrain and taking tight turns, you can imagine the fuel in your fuel tank is sloshing around and creating all sorts of problems for your fuel supply. The problem is, your stock fuel pump simply lacks the technology to effectively remove contaminants such as dirt, debris, water, air, and vapor from your fuel supply, thus creating inconsistent fuel pressure and delivering contaminated fuel to your injectors. Simply put, high performance applications demand a higher fuel flow, yet higher fuel flow strengthens the vacuum at the fuel pump and agitates the fuel tank. The added air/vapor generated in this process contributes to less than optimal power and efficiency, as well as galling and pitting of your injector barrel assembly and tip erosion. An air fuel separator gets rid of the excess air keeping your engine from consistently producing performance-ready power and inflicting irreparable damage to your injectors. Typically, an air fuel separator draws fuel from the tank and sends it through a water separator, removing large particulates. Then, fuel under positive pressure flow enters the fuel filter and passes through the filter where any remaining particulate contaminates are removed and any entrained air/vapor is separated. At last, your injectors are fed a clean, consistent supply of fuel and you can enjoy the high performance and efficiency your truck was designed to produce. FASS and AirDog are the leaders in air fuel separation technology and your source for ultra-efficient lift pumps, and you can find the right kit for your specific application right here at Stage 3, as we carry a massive selection of fuel pumps for varying degrees of power, from stock to high-performance application.