hay, i have a 89 mkIII with a small idle issue it has always idled funny(after i got it back from mechanic). history ,lol some girl blew my head so i got a new 1 and ported and pollished it had to have mechanic do wiring and vaccum lines. it would idle at 900 rpms cold but when i drove for a wile it would go up to 14- 1500 rpms. also it shakes bad idleing at 900 rpms. it has gottin worse do to the cold weather at night like this morning it was idling at 500rpms sounding like it wanted to die out. so plz help n ty