Technical Center

How to Solve High Return Oil Diagnosis for Diesel Injectors using the CR304S Professional Injection Testing Solution and Common Rail Injector Test Bench

Apr. 30, 2026ID: 19Views: 105

Why High Return Oil is a Nightmare for Diesel Engines

In the world of diesel maintenance, high return oil diagnosis for diesel injectors is critical. Excessive back leakage often leads to hard starting, power loss, and fuel inefficiency. To provide a precise fix, technicians need more than just manual tools mdash;they need a CR304S professional injection testing solution. This high-precision common rail injector test bench is engineered to simulate real-world engine conditions, ensuring every solenoid and piezo injector meets OEM standards.
CR304S common rail injector test bench for high pressure diesel testing

Standard Features & Functions

The CR304S is built for reliability. It automates the testing process, allowing for rapid high return oil diagnosis for diesel injectors across multiple brands.

Standard FunctionDescription
Fully Automatic TestingOne-touch operation for Bosch, Denso, Delphi, and Siemens injectors.
Flow MeasurementHigh-precision flow sensors for accurate delivery and return oil data.
High Pressure Leak TestTests sealing performance up to 2400 bar to detect internal leakage.
Database UpdatesOnline access to thousands of standard test plans and calibration data.


Optional Features for Advanced Workshops

To maximize your ROI, the CR304S offers modular upgrades, turning it into an all-in-one common rail injector test bench.

Optional FunctionBenefit
Injector CodingGenerate IMA/IQA codes for Bosch, Delphi, and Denso injectors.
BIP TestingMeasure the Beginning of Injection Period for solenoid response time.
Forced cooling SupportForced cooling of the entire fuel system temperature
AHE MeasurementArmature stroke testing for Bosch injectors.


Digital flow sensor measurement interface for high return oil diagnosis

Technical Parameters

Precision starts with the right specs. The CR304S is designed to handle the toughest CR304S professional injection testing solution requirements.

ParameterSpecification
Output Power7.5KW / 11KW / 15KW (Optional)
Rail Pressure Range0 - 2500 Bar
Pressure Control Accuracy±0.5 Bar
Fuel Temperature Control40±2 ℃ (Built-in Cooling System)
Pulse Width Range100 - 3000μs

Testing Range & Compatibility

The CR304S is a universal common rail injector test bench. It covers:

  • Bosch: CRI 1.0, 2.0, 2.2, CRIN series.

  • Delphi: All C2i, C3i, and F2R series.

  • Denso: G2, G3, and Piezo series.

  • Caterpillar: common rail CAT injectors.

CR304S common rail test bench detail-work area

Conclusion: Elevate Your Repair Standards

By integrating the CR304S professional injection testing solution into your shop, you eliminate the guesswork in high return oil diagnosis for diesel injectors. Trust the common rail injector test bench that the pros use to ensure every repair is done right the first time.

Get in touch
+86-13583836021