Delphi DFi 1.5 Injectors – Extended Bleeding Procedure to Prevent Injector Damage on Start-up

Some Delphi DFi1.5 injectors have been reported to suffer from sticking of the injector control valve upon vehicle installation. This extended bleeding procedure may prevent this problem.
Delphi’s fast solenoid DFi 1.5 diesel fuel injectors were developed for light-duty vehicles and feature up to 2,000 bar injection rate capabilities. This allows for increased multiple injections and minimum separation. These injectors have been used by many manufacturers such as GM, Citroën, Dodge, Ford, Great Wall, Hyundai, Kia, Mercedes Benz, Opel, Peugeot, Seat, Skoda and Volkswagen.

The trouble with the sticking injector control valve is due to the continuous control valve movement before the diesel fuel has sufficiently lubricated the moving surfaces inside the injector.

To improve component lubrication during injector bleeding, Cornell Diesel Systems have created the following extended bleeding procedure, based on recommendations from Delphi to prevent control valve seizures:-
NOTE: Only a qualified technician should carry out these repairs.

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