Checking the vacuum pump
- Remove the quick coupling of the vacuum line at the vacuum pump.
- Fit gauge 9995230 on the pump.
- Start the engine and read the gauge.
The value should lie between 80-90 kPa negative pressure.
- Turn off the engine
- The vacuum should not sink too quickly (If the pump has difficulty reaching 80-90 kPa negative pressure, replace it).
- Remove the pressure gauge
- Fit the vacuum line's quick coupling on the pump.