|
|
Content .. 1464 1465 1466 1467 ..
3. FUEL SYSTEM LEAK Turn the ignition off. WARNING: HIGH-PRESSURE FUEL LINES DELIVER DIESEL FUEL UNDER EXTREME PRESSURE FROM THE WARNING: FUEL UNDER THIS AMOUNT OF PRESSURE CAN PENETRATE SKIN CAUSING PERSONAL Is there any evidence of leakage? Yes >> Repair as necessary in accordance with the Service Information. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go To 4 4. CHECKING FOR AIR IN FUEL SYSTEM Start the engine. With the scan tool in Sensors, compare the Fuel Pressure Setpoint with the Actual Fuel Pressure readings. NOTE: If there is air in the fuel system, the Actual Fuel Pressure will oscillate more than 100 psi above Does Actual Fuel Pressure oscillate more than 100 psi above and/or below the Fuel Pressure Setpoint? Yes >> Refer to the Service Information to purge air from the fuel system. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go To 5 5. FUEL PRESSURE SOLENOID Turn the ignition off. Replace the Fuel Pressure Solenoid in accordance with the Service Information. Turn the ignition on. With the scan tool in Sensors, read and compare the Fuel Pressure (PSI) with the Fuel Pressure Desired/Setpoint NOTE: The Fuel Pressure reading should directionally follow (trail) the Fuel Pressure Desired/Setpoint read- Does the Fuel Pressure reading directionally follow the Fuel Pressure Desired/Setpoint reading? Yes >> Test Complete. No >> Refer to the Service Information and replace the Fuel Injection Pump assembly. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 9 - 1888 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |