13 31 029 Checking delivery pressure

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Special tools required:

13 5 220
13 5 221
13 5 222

See FUEL SYSTEM - SPECIAL TOOLS (N51, N52K) .

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

Necessary preliminary tasks:

Switch off ignition.
Remove acoustic cover . See 11 00 REMOVING AND INSTALLING/REPLACING ACOUSTIC COVER (N51) .

Remove dust cap (1).

Fig 1: Locating Dust Cap

Courtesy of BMW OF NORTH AMERICA, INC.

Procedure with the 25 bar pressure sensor:

Connect special tool kit 13 5 220 (comprising 13 5 221 and 13 5 222 ) to pressure sensor of DIS Tester.

Connect pressure sensor to DIS Tester.

Fig 2: Identifying Special Tool (13 5 221 And 13 5 222)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Mount special tool kit 13 5 220 to injection tube and tighten knurled nut hand-tight.

Screw out check valve (1) so that valve in pressure regulator housing is closed.

Establish fuel delivery pressure.

Screw in shutoff valve (1) until a pressure reading is displayed on BMW diagnosis system or IMIB. Read off fuel delivery pressure and compare with values in BMW diagnosis system.

Fig 3: Identifying Special Tool (13 5 220)

Courtesy of BMW OF NORTH AMERICA, INC.

Procedure with the 100 bar IMIB pressure sensor:

For the check of fuel delivery pressure with the 100 bar IMIB pressure sensor only tool 13 5 221 is needed from the set of special tools. Unscrew special tool 13 5 222 from special tool 13 5 221.

Install special tool 13 5 221 at fuel injection pipe and tighten knurled nut hand-tight. Unscrew shutoff valve so that valve in pressure regulator housing is closed. Screw onto special tool 13 5 221, the special tool 11 4 310. Screw IMIB 100 bar pressure sensor on the special tool 11 4 310. Establish fuel delivery pressure. Screw in shutoff valve until a pressure reading is displayed on IMIB. Read off fuel delivery pressure and compare with values in BMW diagnosis system.

Fig 4: Installing Special Tools At Fuel Injection Pipe

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Note: Removal of the set of special tools 13 5 220 :

Stop engine.
Fully unscrew shutoff valve
Remove set of special tools 13 5 220 from pressure regulator housing
Catch and dispose of escaping fuel

NOTE: Read out fault memory of DME control unit.
Check stored fault messages.
Now clear the fault memory.