Hyundai Elantra: Fuel Delivery System / Release residual pressure in fuel line

Hyundai Elantra (CN7) 2021-2025 Service Manual / Engine Control / Fuel System / Fuel Delivery System / Release residual pressure in fuel line

Release Residual Pressure in Fuel Line

•	There may be some residual pressure even after "Release Residual Pressure in Fuel Line" work, so cover the hose connection with a shop towel to prevent residual fuel from spilling out before disconnecting any fuel connection.

1.	Turn the ignition switch OFF and disconnect the battery (-) cable.

2.	Remove the fuel pump fuse (A).

3.	Connect the battery (-) cable.

4.	Start the engine and let idle, and then turn the ignition switch OFF after the engine has stopped on its own.

5.	Disconnect the battery (-) cable, and then install the fuel pump fuse.

6.	Connect the battery (-) cable.

Delete the Diagnostic Trouble Code (DTC) related the fuel pump fuse with the diagnostic tool.

•	When removing the fuel pump fuse, a Diagnostic Trouble Code (DTC) may occur. Delete the code with the diagnostic tool after completion of "Release Residual Pressure in Fuel Line" work.

Fuel pressure test

Fuel Pressure Test1.Release the residual pressure in fuel line.(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line") • When removing the fuel pump fuse, a Diagnostic Trouble Code (DTC) may occur...

Fuel Tank

Repair procedures Removal1.Release the residual pressure in fuel line.(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")2.Turn ignition switch OFF and disconnect the negative (-) battery cable...

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Tachometer

The tachometer indicates the approximate number of engine revolutions per minute (RPM).

Use the tachometer to select the correct shift points and to prevent lugging and/ or over-revving the engine.

NOTICE

Do not operate the engine within the tachometer's RED ZONE. This may cause severe engine damage.