A weak point on this engine is the fuel pressure regulating valve and is very difficult to diagnose, sometimes only when it becomes difficult to start after a short journey, it is locating on the fuel rail and quite a job to get to.I now always look in this area when running problems occurr on this model. Other issues I have seen are premature valve stem wear and sticking valves due to poor fuel quality. Always best to use high octane, low sulpher fuel as all FSI engines.
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