Testing and Failure Analysis.

Common Rail Testing

The future is common rail injection but did you know these systems have been in North America since the late 90’s?  Not standing still, Prince George Fuel Injection has been testing these injectors for over a decade.  Now running the state of the art EPS205 Bosch test stand, we can test all makes of common rail injectors.  

Test Protocal

Checking for external leaks at the injector body and nozzle as well as internal leaks resulting in high return flow.

Full load fuel delivery.  This is considered a non-ballistic test as the nozzle needle has reached its full lift.  Maximum fuel delivery is measured at full rail pressure.

An emissions test point deemed crucial by the fuel system and engine manufacturers.

Idle fuel delivery test.  Excessive resistance within an injector will show up here at lower rail pressure and pulse width.

Pilot injection.  This test is performed with a very short pulse width to determine if the injector response time is adequate to consistently delivery fuel.

Both coil and piezo injectors are tested for correct resistance.  Coil injectors receive a further inductance test to check coil integrity.  Piezo injectors run an ISA test using the IQA code to determine if fuel delivery at a given voltage matches the code value.

Mechanical Injector Testing

From the first diesels to today’s small industrial engines, the mechanical injector has been around for a very long time.  They come in many different types from all major fuel system manufacturers.  More recent iterations have two springs, allowing for multiple opening pressures.

  • Nozzle Opening Pressure
  • Spray Pattern
  • Leak Down
  • Chatter

Free Testing!

Mechanical Injector Testing

Free Testing!

From the first diesels to today’s small industrial engines, the mechanical injector has been around for a very long time.  They come in many different types from all major fuel system manufacturers.  More recent iterations have two springs, allowing for multiple opening pressures.

  • Nozzle Opening Pressure
  • Spray Pattern
  • Leak Down
  • Chatter

HEUI Injector Testing

We currently test the early HEUI injectors found in Ford, International and Caterpillar applications.  The added complexity of a high pressure oil system adds new challenges to testing.  A long response time of the poppet valve can lead to a delayed injection event which increases emissions, causes hard starting, and poor fuel economy.  This Caterpillar injector can be found in Navistar engines such as the DT466E, I530E and the T444E as well as the 7.3L Ford PowerStroke.

  • Internal Leak Test
  • Nozzle Leak Test
  • Poppet Valve Clearance
  • Flow Testing
  • Coil Resistance and Inductance

Failure Analysis

Down time and repair costs are things that cannot always be avoided but repeat failures are.  At Prince George Fuel Injection testing injectors is more that a simple pass or fail.  We delve into the cause of failure, to uncover any underlying issues.