Detroit Diesel Injector Troubleshooting

To determine if repair is possible or replacement is necessary perform the following procedure.

Flowchart for Repair or Replacement of Electronic Unit Injector

To remove the injector, complete the following steps: ?

Loosen the injector wire terminal screws two full turns and remove the terminal wires.
Remove injector hold down crab.
Lift the injector from its seat in the cylinder head by inserting a pry bar under the injector body.
Cover the injector hole in the cylinder head to keep out foreign material. Remove carbon from the injector exterior in the area where the tip joins the nut, using wire buffing wheel, J 7944 .