Diesel Injector Testing

Delco Diesel Services can test most types of HEUI, EUI and Common Rail Diesel Injectors, cost will vary, but if we find they are out of specification and you purchase an exchange there is no charge for the test on the replaced injector.

Check & Advise Information

Delco Diesel Services offers a check and advise service for many Electronic Unit Injectors. This state of the art test procedure determines whether your injectors are worthy of reinstallation. If the injectors pass the testing criteria, new o-rings are available for installation. Should your injectors fail testing criteria, Delco Diesel Services can replace your injectors with top quality remanufactured injectors. Contact us to take advantage of this service with a potential for great savings.

*Please be aware that an Injector Check and Advise has no WARRANTY coverage. Upon testing (good) means that the injector appears to be in good working condition. It does not guarantee that it is. There could be internal wear issues that do not show up in the Check & Advise program. 

EUI Testing

Electronic Unit Injector Test and Advise Service:  We can test Caterpillar 3176, 3406E, C-10, C-12, C-13 C-15, Cummins CELECT, Detroit 60 Series (not N-3), John Deere, Volvo, Hino, Audi and Volkswagen Injectors.


HEUI Injectors

Delco Diesel Services can test and advise on the Hydraulic Electronic Unit Injectors (HEUI) utilized on the International T444E, DT466E, 530E, Caterpillar 3126E, 3408, 3412, C-7 and C-9 Engines and Ford 7.3 Powerstroke Engines.


Common Rail Injectors

We can test your common rail injectors for Chevrolet, Ford and Dodge Diesel pickups. We can test most Bosch, Denso, Isuzu, Caterpillar, Siemens and Delphi common rail injectors used in Diesel pickups, Sprinters and most newer Cummins, Perkins, John Deere engines.

  • DODGE – CUMMINS 5.9L, 6.7L, 3.0L
  • CHEVY – GMC 6.6L
  • SPRINTER 2.7L, 3.0L

Our technichians utilize the Bosch EPS-205 and the Hartridge IFT-70 Common Rail Injector Test Benches and can test nozzle opening pressure, fuel delivery, atomization, tip leakage, solenoid actuation and fuel return.


Additional information can be found at www.choosetherightinjector.com

Gasoline Injector Service

Our 8 step process will improve fuel economy and performance.

  • Injectors are externally cleaned and visually inspected.
  • Injectors are tested for resistance, inductance, shorts and current draw.
  • Injectors receive leak tests, spray pattern examination and flow rate tests.
  • Injectors are ultrasonically cleaned and back-flushed.
  • Injectors are tested at various pulse widths from cranking to 10,000 RPM.
  • Filter baskets, O-rings, and pintle caps are installed, if applicable.
  • Injectors receive a final cleaning and placed in plastic bags.
  • A comprehensive test report is prepared and returned with the injectors.
Before-Side View
Before-Side View
After - Front View
After - Front View
Injector Type: Cost
Bosch MPI $22.50 Each
Bosch CIS $22.50 Each
Honda Keihin $22.50 Each
Lucas MPI $22.50 Each
Multec Disk Type $22.50 Each
GM TBI $22.50 Each
Bosch TBI $22.50 Each
Holley TBI $22.50 Each
Nissan MPI $22.50 Each
JECS MPI $22.50 Each
Vortec Assembly (6 cyl) $135.00 (Assy.)
Vortec Assembly (8 cyl) $175.00 (Assy.)
GDI $30.00 Each
CNG $30.00 Each



gas inj