Hi guys and gals, I have an Audi A3 1.6 09reg . But I’ve recently had a little problem with it . When I’m idling at traffic lights etc (engine idles fine )and go and move of there’s a little jult like a little a mis fire , I’ve had my sparks plugs changed and the ht leads and coil pack but it still has this little mis fire . Any ideas would be grateful .