RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
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1. Remove the lower left hose on the double T pipe in driving direction (Figure 5).
2. Connect a vacuum pump to the hose.
3. Create a vacuum of 500 mbar.
4. Within a minute the vacuum must not drop by more than 10 mbar.
5. If not correct, check the vacuum pipes between T pipe and changeover valve under the intake manifold for leaks and kinks.
