Check Fuel Initial Pressure (S85)

13 31 029 - Check fuel initial pressure (S85)





Special tools required:
- 13 3 060
- 13 5 270





Necessary preliminary tasks:
- Read out fault memory of DME control unit
- Switch off ignition





Important!
Fuel in fuel lines is under pressure.
Catch and dispose of escaping fuel.





Recycling:
Catch and dispose of escaping fuel in a suitable container.
Observe country-specific waste-disposal regulations.





Release quick-release fastener on fuel feed line.
Connect special tool 13 5 270 between fuel feed line (2).
Connect pressure sensor (3) of BMW diagnosis and information system. Or connect special tool 13 3 060.





Measuring fuel pressure:
- Connect pressure sensor to DIS tester
- Connect DIS tester to vehicle
- Select Drive
- Select Engine electronics
- Select Fuel supply
- Select Fuel pressure sensor
- Read off fuel pressure

Note:
The vehicle has different fuel pressures when starting and when idling.

Test pressure, refer to Technical Data Technical Data.

Switch off engine.
Assemble vehicle and check fuel system for leaks.