General Information

If an injection nozzle is not properly delivering fuel into the pre-combustion chamber of a cylinder, driveability could be greatly affected, or a DTC may set. If other diagnosis indicates, or if the injection nozzles are suspected of not properly delivering fuel, they should be tested. Typically, a nozzle failure can be detected by using the injector balance test. Nozzle testing is comprised of the following checks:
^ The injector balance test, performed with scan tool
^ The nozzle opening pressure test
^ A leakage test