Optima L4-2.4L (2001)
Fuel Pressure Release: Service and Repair
1. Reduce the internal pressure of the fuel pipes and hoses by the following procedures.
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Open the trunk door and disconnect the fuel pump harness connector in the trunk room.
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Start the engine and after it stalls, turn the ignition switch to the OFF position.
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Disconnect the battery negative (-) terminal.
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Connect the fuel pump harness connector.
