I'd look at the injectors next, well known to cause problems and you've looked at the other two already. Are any of the plugs fowled?
I had faulty injector on cylinder 3, when i pulled the plug it was soaking wet from fuel, certainly not a comprehensive test but might help.
@AJP
Incidentally it had an injector replaced on cylinder 4 a few weeks ago - this was to cure a bad idle with frequent misfires at idle. At that point in time, it behaved very well under load, apart from some fuel cuts from a greedy Stage 2 map that we cured with a Loba pump.
I haven't pulled any of the plugs yet. I've got the weekend off so I think I'll have a closer look at things. One thing I did notice when I was doing the coil packs yesterday was a little bit of oil on the cam cover:
Is this a concern, and could this be causing an ignition problem?
And has anyone with misfires caused by a plug or coil had the "Random/multiple cylinder misfire" fault? I keep thinking it's significant.
I should have asked you or told you that the centre bolt is quite wet?. Where's the most wet part or are those bolts loose?.
I missed that reply mate, sorry.
Yeah that's why I put the photo up, I took it before I took the coils out, half expecting 2 or 3 to be covered in oil, but they weren't, just a little spot on each of the 4. Although, it might make sense that plug 2 is fouled if there's enough oil getting down there.
If I pull the plugs and 2 is wet with just fuel I'm still thinking injector. But... if it's oil and it's simply fouled from above, then maybe a new cam cover is in order. I'd take that over injector.
I didn't try the bolt. Not sure I've got a torx bit to fit that. Do you know what size it is?
no need to be sorry as I sometimes miss a post in a thread.
If the oil in in the chamber that shouldn't and wouldn't cause the misfire unless it's drowned as ive seen some really bad cam cover leaks on my time working on cars.
You won't find fuel in the chamber where plug can be seen after removing the coil pack. Seriously man you need vagcom rather than guessing what if as this will eliminate injectors or point toward the failed one. loba but no vagcom?.
£40 if that for a copy of vag and he'll be your best friend for life oe the ownership of your motor.
I'm sorry but I don't know although it looks like a torx 35 from the picture but I could be wrong. torx set ebay less than a tenner my friend. most enthusiasts have a basic tool kit so I think you should also keep this in mind and maybe invest in a few bits if you're planning on dyi
I wonder if the injector seal is leaking as my tt did that on number 2 cylinder and once replaced it stopped hissing at me lol £4 from Audi per O ring although the tfsi is different.