Next question...
I'm 99% sure a coil went on my car last night, it had all the tell tail signs - juddering & sounds like a suburu blitz exhaust blah blah.
I had a spare in my boot, i changed each coil untill the car sounded better. After changing coil 3 the car sounded normal again. Although it was 0215 on a pitch black country road so i couldn't really have a good look at each coil.
However, thinking i'd fixed it, i drove 0.5mile and the same happened again. So i'm not sure if another coil went, or if i never remedied the first coil.
Vagcom has gave me the following codes:
16795 - secondary air injection
16684 - random misfire (see below)
16685 - cylinder 1, misfire
17766 - cylinder 2, ignition circuit Open Circuit
I've just had a mess with the coil packs, and found the following:
When coil 1 is removed (other 3 coils still in place) - car runs but is juddering
When coil 2 is removed (other 3 coils still in place) - car runs but it juddering
When coil 3 is removed (other 3 coils still in place) - car don't start at all
When coil 4 is removed (other 3 coils still in place) - car don't start at all
So am i right in thinking coil 1 & 2 both need replacing?
I can't beleive such a simple commom fault can be so much hassle to fix!
Any info is much appreciated!!