MkIV ASZ Uneven Idle (with logs)

Had an uneven idle (no misfire just hunting up/down 850-950 rpm) for a while on my mk4, did a scan expecting to find a faulty temp sensor as had that before.

The only other symptoms are the odd time there's a drop in power, not quite like limp mode but definitley noticable and usually when on a steep hill.

However, all seems fine other than a (I guess unrelated) ABS error 18261 / P1853 which i'll investigate seperately.

After a bit of searching forums, it seems that it could be related to an injector problem, so I dusted off my VCDS cable and off I went to take a look at some measuring blocks

Logging engine blocks 001 011 and 013 I can see what I believe may be issues, but would be keen to hear thoughts from the pro's, including suggestions on the cause.

IQ seems to spike randomly (as in fields H13 & H22) Additionally, Cylinder 3 is showing positive numbers while 1 2 and 4 are negative.

Extract from log below, can make other logs/measurements if required.

thx
J