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9) Unstable idle speed after engine warm-up Yes Fix the indicated malfunction. 1 Turn the ignition switch to “ON” position. No Proceed to next step. Yes Proceed to next step. 2 Turn the ignition switch to “ON” position No Repair or replace the wiring harness and relevant parts. Yes Proceed to next step. 3 Shut down the engine and verify that the No Replace Yes Proceed to next step. 4 Verify that the air intake manifold No Fix the leakage of air intake system Yes Proceed to next step. 5 Connect the fuel manometer valve (the No Proceed to Step 9 Yes Proceed to Step 8 6 Provide a voltage supply of 12V with No Proceed to next step. Yes Replace 7 After washing and cleaning the fuel No Replace the fuel injector. Yes Replace the fuel. 8 Verify that the fuel is deteriorated or No Proceed to Step 14. Yes Proceed to next step. 9 Verify that the fuel pressure is lower than No Proceed to Step 13. Yes Proceed to next step. 10 Turn off the fuel manometer valve. No Proceed to Step 12. 11 Turn on the fuel manometer valve and Yes Replace the fuel pressure regulator.
G-76 |