HEUI for Trooper

Diesel Hydraulic Electronic Unit Injection [HEUI] system repair for:

  • Isuzu Trooper (with 4JX1 engine, year model 1999 and up)
  • Heavy Duty & Light Duty trucks, mining and industrial equipment from Caterpillar, Navistar and Powerstroke.

isuzu trooper park 21

HEUI was designed by Caterpillar to deliver better fuel economy in large diesel engines. The Isuzu Trooper and Ford Powerstroke were the first non-industrial applications of the technology.

In HEUI engines, fuel delivered to the injectors is controlled by an Electronic Control Module (ECM), while an oil pump forces the engine oil at pressures of up to 4000 PSI. The pressurized engine oil fires the injectors at the necessary rate to produce the optimum use of fuel for the engine load and vehicle speed, maximizing fuel economy and minimizing emissions.

What we diagnose and/or correct:

    1. spray pattern
    2. operation of the control valve
    3. leaky or seized injectors
    4. discharged fuel volume
    5. uneven flow rates

heui trooper injector lo 21heui trooper test lo 21

heui trooper injector 2apr21heui powerstroke 2apr21

Drive with confidence. Always.