Checking fuel pump delivery pressure (N62)
WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
NOTE:
For special tools, refer to FUEL SYSTEM - SPECIAL TOOLS - 645CI
.
- 13 3 010
- 13 5 220
Switch off ignition.
IMPORTANT:
The fuel in the fuel lines is under pressure (approx. 3 bar)! Catch and dispose of escaping fuel.
Remove acoustic cover.
Remove dust cap from measuring valve on fuel rail. 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.
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.
Screw in check valve (1) until a pressure reading is indicated on DIS Tester.
- 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. See FUEL SYSTEM - TECHNICAL DATA . Switch off engine.