The tachometer jumps up and down while sitting still, from 10 to 30.
Why does my 2007 Volkswagen G.T.I. not idle correctly when I am sitting still. on 2007 Volkswagen GTI
scan codes to see if there are any then post
1 more answer
review when last tuned. may be problem with ignition system. bring to shop for diagnostic to find out for sure.