A question to all still active 9000 drivers. For some time now the car does not jump immediately after longer service life, i.e. also overnight, but only after a few seconds. Presumably that the check valve does not remain completely tight anymore and the necessary pressure is built up by the pump. Now my question to you, how can you proceed here with a practical solution without demolishing the connections to the pump. How about, for example, an additional in di e line used additional check valve that can be replaced more easily in case of error. However, I leave it that way if necessary, but would like to drive the car for the next 4 years. VG rpe 9000