Login
My Account
My Cart
The site navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.
Enter your truck info so we can recommend the right products for you.
Can't find it? Call us at 859-737-4966 for free advice.
Menu
Injection Pump
Injector
Programmers
Turbo Charger
Banners
Decals
Hats
Hoodies
License Plates
Shirts
Tank Tops
Show your support with a Thoroughbred Diesel t-shirt, sweatshirt, or sticker decal.
If you’re a 1998.5–2002 Dodge Cummins owner dealing with hard starts, stalling, or error codes like P0216, the VP44 injection pump is likely on your radar. Diagnosing this pump has always been tricky—until now. The VP44 Breakout Box Diagnostic Tool from Thoroughbred Diesel brings a new level of precision and ease to pinpointing issues with the VP44 fuel system, saving both time and money for diesel technicians and DIYers alike.
Developed in-house by Thoroughbred Diesel, the VP44 Breakout Box is a plug-and-play diagnostic tool designed to analyze key circuits within the VP44 injection pump system. Simply connect the tool between your vehicle’s ECM and the VP44 pump harness, and it gives you real-time access to test signal continuity, voltage readings, and injector firing function without needing to back-probe wires or use complex scan tools.
VP44 pumps are notorious for failing due to poor lift pump support, heat, and electronic issues. Traditional diagnosis usually requires sending in your ECM or pump for bench testing, which can be time-consuming and costly. The breakout box simplifies this by allowing users to:
Wade from Thoroughbred Diesel walks through the use of the VP44 Breakout Box in a hands-on tutorial, showing how the tool interfaces with the VP44 wiring harness and what diagnostics you can perform. He explains how to identify open circuits and test the PSG for failure—one of the most common issues affecting the VP44 system. For a deeper dive, the second video demonstrates live voltage testing, signal tracing, and common faults.
This diagnostic box is designed by the diesel experts at Thoroughbred Diesel, so it’s tailored specifically to VP44 systems found on 5.9L 24V Cummins trucks. It features heavy-duty construction, labeled switch controls, and color-coded terminals—making it intuitive even for those new to diesel electronics.
The VP44 Breakout Box is a game-changer for anyone troubleshooting VP44 injection pump issues. Whether you’re a professional diesel technician or a weekend warrior working on your own truck, this tool empowers you with fast, accurate diagnostics—without guesswork or unnecessary part swapping. Get yours today from Thoroughbred Diesel and make VP44 headaches a thing of the past.