Bonbo Compucheck Fuel Pressure Test Gauge 0-300 PSI — TU-32-20 3½" Dial with 6ft Hose for Cummins & Diesel Engines

The Bonbo TU-32-20 is a Compucheck-compatible fuel system pressure test gauge that reads 0–300 PSI for accurate diagnostics on Cummins and other diesel engines with Compuchek ports.

Built as a ready-to-use diagnostic assembly, the TU-32-20 pairs a female Compucheck fitting with a 3½-inch, 300 PSI dial and a flexible six-foot hose to let technicians and DIY mechanics check injection pump and fuel-line pressure quickly. It’s made for under-hood access and on-vehicle testing, with a tough rubber hose and straightforward threaded fitting so you can connect directly to factory Compuchek ports without adapters.

How does this gauge help me find fuel system issues?

By delivering a direct, mechanical pressure reading at the factory Compuchek port, this gauge shows real-time fuel pressure under different operating conditions. That helps you confirm whether the pump, regulator, injectors, or return lines are within expected ranges before replacing parts.

• Direct 0–300 PSI mechanical dial for instant readings
• Connects to OEM Compuchek ports — no modification needed
• Six-foot hose lets you test with the engine running and under load
• Identifies low pressure, pressure leaks, and regulator faults

What engines and ports are compatible with the TU-32-20?

This tool is aimed at Cummins diesel engines and any diesel system equipped with Compuchek-style test ports. If the vehicle has a standard Compuchek fitting on the fuel rail or pump, the Bonbo TU-32-20 will connect directly.

• Designed for Cummins diesel models with Compuchek ports
• Works on other diesel engines using the same Compuchek fittings
• Female Compuchek fitting eliminates need for extra adapters
• Ideal for bench testing or in-vehicle diagnostics

How durable and accurate is the gauge assembly?

The TU-32-20 uses a protected 3½" dial rated to 300 PSI and a synthetic rubber hose finished with a red abrasion-resistant coating. The construction balances field durability with the mechanical stability needed for clear, repeatable pressure readings.

• 3½-inch mechanical dial for visible, reliable measurements
• Synthetic rubber hose with protective coating for wear resistance
• Threaded/durable Compuchek fitting to maintain leak-free connections
• Simple mechanical gauge avoids electrical dependencies

What comes in the box and what support is available?

The kit ships complete with the hose assembly, female Compuchek fitting, and the pre-mounted 300 PSI gauge so you can begin testing immediately. Bonbo provides return and warranty options and asks customers to contact support with photos if any issues arise.

• Complete gauge assembly with hose and fitting included
• Ready to use out of the box — no extra cables or adapters
• 30-day return policy and 1-year replacement warranty available
• Customer support requests handled with photo documentation

Who is this for? If you maintain Cummins-powered trucks, work in diesel repair, or are a hands-on owner troubleshooting fuel delivery problems, the Bonbo TU-32-20 is a practical, cost-effective diagnostic tool. It’s particularly useful for fleet technicians, mobile mechanics, and DIYers who want a direct, mechanical gauge to confirm fuel system pressure without relying on electrical adapters or guesswork.