13 31 029 Checking fuel pressure (N62TU2)

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

13 5 220 . See FUEL SYSTEM - SPECIAL TOOLS .

Necessary preliminary tasks:

Read out fault memory of DME control unit
Switch off ignition
Remove engine cover (acoustic cover) by removing 4 cover screws. Raise cover and remove toward front.

Fig 1: Identifying Acoustic Cover

Remove right ignition coil cover

IMPORTANT: Fuel in fuel lines is under pressure (approx. 3-5 bar)!
Catch and dispose of escaping fuel.

Remove dust cap on measuring valve of fuel rail.

Unscrew non-return valve (1) on special tool kit 13 5 220 .

Mount special tool kit 13 5 220 on fuel rail and tighten knurled nut until hand-tight.

Start engine.

Screw in non-return valve (1) until a pressure reading is indicated on the DIS Tester.

IMPORTANT: Do not under any circumstances screw in the check valve up to the mechanical stop. This could damage the valve in the fuel rail.

Fig 2: Identifying Non-Return Valve And Special Tool Kit 13 5 220

Courtesy of BMW OF NORTH AMERICA, INC.

Measuring fuel pressure:

Connect pressure sensor to DIS Tester
Start engine
Select Measurement.
Multimeter function appears
Select Pressure test
Read off fuel pressure

Test pressure, refer to TECHNICAL DATA. See FUEL SYSTEM - TECHNICAL DATA .

Switch off engine.

Assemble vehicle and check fuel system for leaks.