If it were mine, I would replace the two O-rings in the EHA, and give the Idle control valve a really good cleaning (visible in your 2nd picture - has part # showing on it...I looked it up, they are not cheap).

Good luck!

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D