- Warm up the engine (up to operating temperature) and let it run at idle speed.
- Disconnect the low pressure hose coming from the activated carbon filter from the pressure reducing valve.
- Check the valve connection for underpressure. If not, check the function of the solenoid valve.
- To do this, disconnect the cable from the battery and remove the plug from the solenoid valve.
- Disconnect the hoses from the solenoid valve and remove the valve. Pre-mark the location of the connection - this will facilitate installation later.
- Check the valve, if it is purged, it is no longer working.
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