Pressure Check

Switch off ignition.

Remove cover from fuel injectors.

Remove dust cap (1) from measuring valve on fuel rail.

Fig 1: Removing Dust Cap From Measuring Valve On Fuel Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Prepare special took kit 13 5 220 (consisting of 13 5 221 and 13 5 222).

Fig 2: Preparing Special Tool Kit

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew check valve (1) on special tool kit 13 5 220.

Fit special tool kit 13 5 220 on measuring valve and tighten knurled nut until hand-tight.

Start engine.

Screw in check valve (1) until a pressure reading is indicated on DIS Tester.

Fig 3: Unscrewing Check Valve On Special Tool Kit

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

Compare actual value of test pressure with specified value.

Switch off engine.

Checking fuel pump: 

Detach Fuel Pump Relay  .

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

Press button and read off fuel pump delivery pressure on DIS Tester.

Compare actual value with specified value of delivery pressure.

Fig 4: Connecting Special Tool To Terminal (87) And Terminal (30)

Courtesy of BMW OF NORTH AMERICA, INC.

Keep special tool 13 3 010 ready for further tests.

Further tests are described in the section "Fuel Pressure Check  ".

Fig 5: Identifying Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.