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P0304-CYLINDER # 4 MISFIRE (CONTINUED) 7. FUEL INJECTOR Remove the suspect fuel injector. Are the fuel injectors damaged? Yes >> Replace the external damaged fuel injector & high pressure connector. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- No >> Go To 8 8. INTERNAL DAMAGED FUEL INJECTOR With the scan tool, erase DTCs. Switch the misfiring injectors & high pressure connector with an injector & high pressure connector from a cylinder Operate the vehicle. Did the misfire DTC follow the suspect injectors & high pressure connectors? Yes >> Replace the internal damaged fuel injector and high pressure connector. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- No >> Go To 9 9. INTERNAL ENGINE DAMAGE Perform engine compression test Did the suspect cylinders pass the compression test? Yes >> Go To 10 No >> Repair the internal damage to the engine. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- 10. INTERNAL ENGINE DAMAGE Perform engine leak down test Did the suspect cylinders pass the leak down test? Yes >> Test Complete. No >> Repair the internal damage to the engine. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- 9 - 1210 ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL DR/DH |