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No Replace the fuel pump Yes Repair or replace the fuel return pipe 13 Verify that the fuel return pipe has any No Replace the fuel pressure regulator Yes Proceed to next step. 14 Disconnect the connector of idle speed 0 C in order to observe whether the engine speed is No Repair or replace the idle speed actuator Yes Proceed to next step. 15 Turn the ignition switch to “ON” No Inspect the wiring harness and plug in connector Yes Proceed to next step. 16 Run the engine at idle speed; until the No Adjust the ignition advance angle Yes Proceed to next step. 17 Verify that the compression pressure of No Fix the malfunction Yes Repair or replace 18 Verify that the absolute pressure and sensor of air intake manifold has any blockage. No Proceed to next step. Yes Replace the ECU. 19 Verify that the coolant temperature No Repair or replace
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