13 31 029 Checking fuel pump delivery 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 .
61 3 050 . See GENERAL ELECTRICAL SYSTEM - SPECIAL TOOLS .

Necessary preliminary tasks:

Read out fault memory of DME control unit.
Switch off ignition.
Remove acoustic cover by removing 4 cover screws. Raise cover and remove toward front. Remove air filter housing on right.

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.

Checking fuel pump:

Remove fuel pump relay . See BUZZERS, RELAYS & TIMERS .

Connect special tool 61 3 050 to terminal (87) and terminal (30).

Operate button and read off fuel pump delivery pressure at DIS Tester.

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

Fig 3: Identifying Special Tool 61 3 050 And Terminal

Courtesy of BMW OF NORTH AMERICA, INC.

Notes on fuel pressure check .

Installation:

Now clear the fault memory.