Removing and installing fuel pressure sender - G247-

Fuel pressure regulating valve - G247- -6- is located on fuel rail. It measures the fuel pressure and sends a voltage signal to the control unit for direct diesel injection system - J248-.

»Carry out the following work sequence«

Removing

Follow these instructions before starting work and while working on the fuel system.

• Remove engine cover panel ⇒ 3 Engine cover panel.
• Before removal, clean thread area in vicinity of fuel pressure sender using e.g. a cold cleaning solvent. No dirt must enter the bore in the fuel rail.

• Under no circumstances may dirt enter the hole of the fuel rail.
• It must be ensured that no cleaning agent gets into the connector housing of the fuel pressure sender - G247-.

• Dry fuel pressure sender - G247-.
• Pull electrical connector from fuel pressure sender - G247-.

Use an extended socket insert.

• Collect escaping fuel with a cleaning cloth.
• Unscrew fuel pressure sender - G247-.
• Use suction device to extract dirt from fuel rail bore (threads and sealing surface). Do not use tools or other instruments for this purpose.

Installing

Use an extended socket insert.

• Tighten fuel pressure sender - G247- by hand.
• Then tighten sender. Specified torque ⇒ Item 11 (page 208).
• After installing, leave engine running at moderate speed for a few minutes and then switch off again.
• Checking fuel system for leaks ⇒ 1.3 Filling/bleeding fuel system.
• Read event memory.
• Then road test the vehicle, accelerating to full throttle at least once. Check high pressure part of fuel system again for leaks.
• Read event memory.