Fuel Injector Cummins 3939826 | 3939826 RX

High-Precision Fuel Delivery for Heavy-Duty Engines

The Cummins 3939826 Fuel Injector is a critical component designed to maintain the peak performance of heavy-duty truck engines. Engineered by industry leaders, this injector ensures that fuel is delivered with absolute precision into the combustion chamber, atomizing it into a fine mist for maximum thermal efficiency.

Key Benefits and Performance

By utilizing advanced materials and manufacturing techniques, this injector is built to withstand the extreme pressures and temperatures found in modern diesel environments. Its integration with the Engine Control Unit (ECU) allows for real-time adjustments, ensuring your engine operates smoothly under varying loads.

• Enhanced Fuel Economy: Precise atomization leads to more complete combustion and lower fuel consumption.
• Optimized Power Output: Maintains consistent engine timing and pressure for reliable horsepower and torque.
• Reduced Emissions: Helps meet stringent environmental standards by preventing “rich” or “lean” fuel mixtures.
• Engine Compatibility: Specifically tailored for Cummins QSB5.9, CM550, and CM850 engine models.

Reliability and Integration

This injector works seamlessly with your existing common rail fuel system and fuel pump. Regular maintenance and the use of clean fuel are recommended to maximize the longevity of the 3939826 injector, preventing common issues such as misfires or irregular idling.