[ Home ]

[ ASNU Solution ]

[ ASNU at Work ]

[ Injector Types ]

[ Parts and Accessories ]

[ About Petrol Injectors ]

[ FAQs ]

[ Photo Gallery ]

[ Contact Us  ]

Ultrasonic Cleaning



The injectors are removed from the vehicle and then ASNU tests for:

  • Leaks - The pressure regulator allows any system pressure from 0 to 8 bar to be set. Furthermore variable system pressure can be used to test for injector leaks.
  • Fuel Spray Management - Spray pattern shapes and atomization quality are easily inspected in the ASNU Display window
  • Fuel Delivery Volumes - The precise quantity of fuel delivered can be measured and compared for up to 8 top feed or 6 side feed injectors at one time.
  • Electronic Operation - ASNU examines the injectors performance during a 10 program option millisecond and RPM simulation program.



After the injectors are clean, the serviceable items are replaced. The injectors are refitted with new filter baskets, pintle protection caps, spacers and O-Ring seals.

Then the injectors are re-tested for leaks, spray pattern shape and atomization, fuel delivery volumes and correct electronic operation. When the operator is satisfied that the injectors are performing as a properly matched balanced set, they are ready to be returned to the engine.

Report Pad

All results, before and after, are recorded on the ASNU Service Report Pad.


In all cases it is essential that the electronic injectors perform as a matched and balanced set. Injectors are tested and checked for the following requirements:

  • A balanced fuel delivery at all operating points

  • Correct fuel distribution (Required point of atomization can vary)

  • Effective fuel atomization (create very small even droplets of combustible fuel)

  • Reliable valve seat sealing - no leaks

  • Retain all its functional values throughout its minimum service




Once the injectors have been tested, the pintle protection caps, filter baskets, spacers and O-rings are removed using ASNU's purpose built tools. The injectors are then placed in ASNU's purpose built ultrasonic cleaning bath for cleaning.

ASNU's patented ultrasonic cleaning process and variable cycle program cleans the inside of the injector, the pintle valve head, pintle seat and pintle needle guides, all back to their original manufactured condition.