Yep, that is the most likely problem but you'd see fueling problems too (you should be running very lean if unmetered air is getting in)

Do you have a stock MAF sensor in the stock intake?

I guess just chalk up the very low load to exhaust restrictions and TIP

You'll probably want to pull timing accordingly, or maybe you have a bad batch of gas

Your MAF reads 125g/s with 1800mBar at peak RPM, if you haven't touched any of the MAF calibration values, you should know it's FUCKED. Stock MAF readings on an AUM are around 130-135g/s. You should be able to see this by looking at short term fuel trims on the stock file, and LTFTs should give it away too. That's what happens when you're a n00B and know nothing and think you can just go and mess with stuff and MAKE POWAR.

Again, the question is why the problem isn't visible in the trims.

You don't need to log them, you can just read them in VCDS with the ignition on.

http://nefariousmotorsports.com/forum/index.php?topic=837.msg7863#msg7863
http://nefariousmotorsports.com/forum/index.php?topic=837.msg8043#msg8043

LTFT
Group 032: 001F (rkat_w), 0021 (fra_w), 0020 (rkat2_w), 0022 (fra2_w)

STFT
Group 033: 001C (fr_2), 0025 (usvk ), 001D (fr2_w), 0026 (usvk2 )

There is a reason I've posted in n00b questions. This is my first time logging a car. Obviously there is an issue with load which I'm addressing now. I'm not sure why your being so negative.

I've done a lot of work to the car and I'm not seeing any fault codes. It starts first time and idles fine and pulls very well. I wouldn't even know there was a problem if I hadn't logged the car in the first place. But your making out like it's because I'm new to tuning and don't know what I'm doing?

I'm working under the assumption that the maf is degraded, I've taken it out for a clean but it might just be on it's way out. I did pick up that my maf readings were low. All I know is take maf and divide by 0.8, I have since been informed by Nyet that this is a bad way to calculate it, but it would at least give me a rough estimate, and I expected to see 200 or so g/s. I realise that 145 g/s is lower than what stock would be putting out. I didn't think I had a problem because the car is going at least as well as it used to and I can hear more boost. I now realise that it will be making more boost with less timing and is probably around the same as it was before mapping. I'm also going back to stock until I get this maf reading sorted. Lesson learned. Getting there with the logs.

I wont. I know I'll get there, I'd just rather be back at stock if I'm running lean. I've given the MAF a good clean, I don't mind getting a new one if needed I just know there are expensive as it's not something you cheap out on

When I got the car it had been neglected and the coolant system was bodged, I've had the head skimmed and put it all back together with new timing kit and hoses, upgraded aluminium coolant flanges, the works.