2007 Volkswagen GTI Q&A

2007 Volkswagen GTI Question: Why does my 2007 Volkswagen G.T.I. not idle correctly when I am sitting still.

The tachometer jumps up and down while sitting still, from 10 to 30. -
Answer 1
review when last tuned. may be problem with ignition system. bring to shop for diagnostic to find out for sure. -
Answer 2
scan codes to see if there are any then post -