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P0303-CYLINDER # 3 MISFIRE (CONTINUED) 3. DAMAGED FUEL LINE Visually inspect the injector supply line for damage. Do you have any kinked or bent fuel line? Yes >> Repair or replace the damaged fuel line. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- No >> Go To 4 4. VALVE TRAIN Visually inspect the valve train and check the valve lash on the suspect cylinder. Is the valve train functional and the lash within the specifications listed in the service manual? Yes >> Go To 5 No >> Adjust the lash or fix or repair any damaged component(s). Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- 5. OBSTRUCTED FUEL INJECTOR SUPPLY Remove the fuel injector supply line for the suspect cylinder. Inspect both ends of the fuel injector supply lines for damage. Using shop air pressure, blow out the fuel injector supply lines to verify that they are not obstructed. Are the fuel lines free of debris or damage? Yes >> Go To 6 No >> Replace the damaged or obstructed fuel injector supply line. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- 6. DAMAGED OR OBSTRUCTED HIGH PRESSURE CONNECTOR Remove the high pressure connector for the suspect cylinder. Inspect both ends of the high pressure connector for signs of damage. Using shop air pressure, blow out the high pressure connector to verify that it is not obstructed. Are the high pressure connectors free of debris or damage? Yes >> Go To 7 No >> Replace the damaged or obstructed high pressure connector. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC- 9 - 1206 ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL DR/DH |