Leak Testing
High pressure nozzle and control valve leak testing help identify injectors that can cause hard starting, fuel dilution, smoke, rough running, or rail pressure faults.
NW Fuel Services
Common Rail Injector Testing and Repair
Bosch common rail injector testing, repair, and calibration on the EPS205 test bench for Duramax, Cummins, Powerstroke, and modern diesel engines.
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Why This Service
- Bosch EPS205 computerized common rail injector testing
- Warranty approved desktop testing for Bosch common rail injectors
- Testing coverage for Bosch, Denso, Delphi, and Siemens injectors
- High pressure nozzle and control valve leak testing
Overview
Service Overview
Common rail injectors are more complex than older mechanical diesel injectors and require a different testing process. NW Fuel Injection Services uses the Bosch EPS205 computerized test bench to operate common rail injectors in conditions that closely match real world diesel operation, then measures leak rates, start behavior, idle quantity, pilot injection, emissions quantity, full load quantity, and actuator resistance.
Common Rail Testing
Computerized Testing On The Bosch EPS205
Common rail injectors are increasingly common in modern diesel engines, but they are also much less tolerant of poor fuel quality than older injector designs. Our testing begins with an external clean, followed by a pre test to measure injector performance as received. The Bosch EPS205 lets our technicians evaluate each injector under controlled high pressure conditions before repair decisions are made.
- External cleaning before common rail injector testing
- As received pre test to document base performance
- High pressure leak testing and operating condition checks
- Computerized results for a clearer repair decision
- Testing that helps speed up diesel fuel system troubleshooting
Vehicle Coverage
Modern Diesel Engines We Commonly See
Common rail injectors are used across light duty trucks, commercial equipment, industrial engines, marine engines, and European diesel applications. Popular applications include GMC and Chevrolet Duramax engines since 2001, Dodge and Ram Cummins engines since 2003, Ford 6.7 Powerstroke engines since 2011, plus many Cummins, Volvo, Deutz, Volvo Penta, Mack, Volkswagen, BMW, and Mercedes diesel engines.
- GMC and Chevrolet Duramax common rail injectors
- Dodge and Ram Cummins common rail injectors
- Ford 6.7 Powerstroke common rail injectors
- Cummins, Volvo, Deutz, Volvo Penta, and Mack applications
- Volkswagen, BMW, Mercedes, and other European diesel applications
OEM Advantage
Bosch Authorized Equipment For Bosch Injectors
Using equipment authorized by the original equipment manufacturer provides the most precise way to examine modern high pressure fuel components. The Bosch EPS205 is warranty approved for Bosch common rail injectors and also supports Denso, Delphi, and Siemens injectors. That gives you a better basis for deciding whether an injector can be repaired, should be replaced, or can go back into service.
- Bosch common rail injector warranty approved testing
- Denso, Delphi, and Siemens common rail injector testing
- Accurate evaluation of high pressure fuel components
- Repair guidance based on measured injector performance
Service Fit
Injectors We Service
Quantity Testing
Full load quantity, idle quantity, pilot injection quantity, and emissions quantity are measured to confirm how the injector delivers fuel at key operating points.
Electrical Checks
Electric buzz testing and actuator resistance checks help reveal electrical faults that can affect injector response and drivability.
Smarter Replacement
Testing separates failed injectors from healthy injectors, which can save money compared with replacing every injector without measured results.
Common Rail Video
See Common Rail Injector Testing
The old NW Fuel common rail page featured this testing video because it helps show how controlled bench testing supports accurate diagnosis. Use it as a quick look at the process before booking injector testing or repair.
- Shows bench based injector testing
- Helps explain why common rail injectors need specialized equipment
- Useful for shops, fleets, and diesel owners comparing repair options
Benefits
Why Choose This Service
- Bosch EPS205 computerized common rail injector testing
- Warranty approved desktop testing for Bosch common rail injectors
- Testing coverage for Bosch, Denso, Delphi, and Siemens injectors
- High pressure nozzle and control valve leak testing
- Identifies which injectors need repair and which are still good
- Helps avoid replacing a complete injector set when testing shows it is not needed
Pricing
Service Pricing
| Style | Price | Turnaround |
|---|---|---|
| Common Rail Injector Testing | $65 | 48 hrs |
| Common Rail Industrial Testing | $78 | 48 hrs |
| Common Rail Injector Repair | Quote | Call |
Process
Our Service Process
External Clean
Each injector is externally cleaned before testing so dirt does not affect the test process or equipment.
Pre Test
The Bosch EPS205 records injector performance as received, including leak behavior and fuel delivery values.
Repair Decision
Test data shows which injectors need repair or replacement and which injectors remain serviceable.
Post-Test Verification
After repair, the injector is tested again for leak rates, quantity values, start behavior, and actuator resistance.
FAQ
Service Questions
We test common rail injectors for GMC and Chevrolet Duramax engines since 2001, Dodge and Ram Cummins engines since 2003, Ford 6.7 Powerstroke engines since 2011, plus many Cummins industrial, Volvo, Deutz, Volvo Penta, Mack, Volkswagen, BMW, and Mercedes applications.
We follow a replace only what is needed approach. Testing identifies which injectors need service or replacement and which injectors are still in good condition, so you can avoid unnecessary full set replacement when the results support it.
Common rail testing can include high pressure nozzle and control valve leak testing, injector start behavior, idle speed adjustment tuning, full load quantity, electric buzz testing, pilot injection quantity, idle quantity, emissions quantity, actuator resistance, and nozzle condition checks.
Common rail injectors operate at very high pressure and have tighter internal tolerances than older diesel injectors. Poor fuel quality or contamination can damage internal components and lead to leak, quantity, or response problems.
Yes. The EPS205 is warranty approved for Bosch common rail injectors and can also test many Denso, Delphi, and Siemens common rail injectors.
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