XDP’s Fuel Sump: A Way to Draw Fuel That Doesn’t Suck


For nearly a decade, XDP has been at the forefront of diesel performance. Diesel enthusiasts (you!) have known for years that the key to increasing horsepower is about increasing fuel and air to make the explosion that takes place inside of the combustion chamber larger, leading to more horsepower. One of the earliest modifications we recommend to do to any diesel truck is an upgraded fuel system like one of the offerings from Airdog or FASS. These fuel systems incorporate finer fuel filters than the factory units that trucks are equipped with along with water separators that ensure only the highest quality fuel makes it to your injection pump and then to your precious injectors. These units only create a slight increase in horsepower but improve the operating efficiency of the truck, the durability and reliability of the fueling system and they increase fuel flow and pressure to make sure that the truck is getting enough fuel for future horsepower upgrades.

Historically one of the challenges to installing these systems was the required installation of a high-flow suction tube, or draw straw. What happens sometimes if the suction tube is not installed close enough to the bottom of the tank is around a quarter tank the truck can start to suck air and lose fuel pressure, which results in a loss of horsepower and a troubleshooting headache. We have developed a solution to both simplify the installation of any aftermarket fuel system as well as improve the performance of them by ensuring they get a constant supply of fuel. Our fuel sump comes complete and ready to install with our internal horseshoe ring that allows a simple installation that does not require dropping the fuel tank.

The reason our fuel sump works so much better is simple: It uses the principle of gravity to its advantage. Fuel comes down into the sump rather than having to be drawn up, which means that the fueling is always ready and waiting for your aftermarket lift pump to send to your injection pump. We designed the sump to work with both a stock tank as well as an aftermarket high-capacity unit so you can get both range and effective fueling from your rig.

With XDP’s fuel sump you can accomplish two important goals: Improving the performance of your aftermarket lift pump and simplifying the installation of your new fuel system. At just $149.95 you can’t go wrong with a fuel sump for your truck, it’s the only sump good enough to wear the XDP logo!


4 thoughts on “XDP’s Fuel Sump: A Way to Draw Fuel That Doesn’t Suck

  1. This sounds like a great product and one that I think I want to try! I have a question about my Airdog100 lift pump that was installed by a shop about 6 months ago. I assume that the new pump required the installation of a “draw straw” as the technician dropped the fuel tank from the truck. Recently after I got the truck back I was driving with just under 1/4 a tank of fuel and the truck lost power and shut off! The tech came out put 10 gallons in and after we primed the system it fired right up! Before the new pump was installed I have ran the tank even lower without issue. My question is: Is it likely my new “draw straw” is too short or was not properly installed?? thanks for your help guys! -Deven 01 24v Cummins!

  2. Deven, it sounds like you are experiencing some 1/4 tank issues. This is exactly what the sump was designed to eliminate. However, because the truck shut off, this is one of the more severe cases I’ve heard of. It is very likely that the draw straw was cut too short. If you don’t have one already, you might want to look into installing a fuel pressure gauge. It is essential to monitor fuel pressure on the 98.5-02 VP44 trucks.

    • I’m not sure if I lost fuel pressure when the truck died or not. I do have a fuel pressure gauge, Pyro, boost, however the sending unit on the fuel gauge is suspected faulty as it usually reads 20ish lbs! Since that first incident however I have kept the take above 1/4 and never once had any more issues! Your help is always appreciated! U guys rock! I will differently be upgrading to the fuel sump and addressing the sending unit issue as soon as funds are available! Thanks again!

      • Thanks Deven! If the issue goes away like that it sounds like the drawstraw may be too short. Sometimes, when shops drop the tank to install a draw straw they will lay it flat on the ground. Doing this causes the bottom of the tank to go inward. Once installed back in the straps and filled with fuel it will then sag and the distance between the bottom of the tank and draw straw could have gone from 1/4″ to 3/4″. We’ve seen this come up a few times as well. Either way, once you get the sump on there you shouldn’t run into anymore of those issues.
        Let us know if there is anything else we can help you with!

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