If new caps and rotors do not fix it, I would be eyeballing the throttle body (ETA, I think is the acronym they use) with great suspicion. You can try cleaning the wire in the O2 sensor with cleaner too, while you have the air box off - just to eliminate that off of your extensive list of things to check. 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