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I bought a boost leak test kit that uses compressed air. I'll do a proper test from the turbo discharge pipe, but on a quick low pressure 5psi test connected on my CAI inlet instead of the filter, I found air escaping where the MAF is installed. The rubber seal around the MAF is allowing air out...

Thanks for the reply . So the VAC hoses on the N75....are there are any other vac hoses that tend to give problems that you know of? I know it's only 1.5PSI or there about's but it's annoying to see the car isn't hitting the requested boost.

Thanks flexiblemouse for the analysis. Good to know that by the sounds of things my MAF is fine and it's just a scaling issue. I thought VWR prided themselves in having a correctly scaled MAF housing. The negative fuel trims was starting to make me wonder a bit, but having looked through some...

I didn't think a boost leak could affect the MAF readings, so that's good to know as to be honest I've been chasing a suspectd boost leak. As lately I've been unable to hit boost requested, and starting to think my K03 with 80,000 miles on it is giving up! In these logs, it shows around 1.74PSI...

2.0 TFSI K03 - Stage 2+ with a VWR CAI and Miltek TBE I've been doing some logging lately and have been noticing my MAF flow rates dropping over time. I apreciate that ambient temperatures play a role so I've been trying to log with consistent air temps. A Stage 2+ K03 should run at around...

Rev. D and DV+ addon is a great combo and works very well on K03's, but the Rev.G is said to release more pressure and hold boost just as well if not better than the D/DV+. I believe that a new Rev.G is still cheaper than buying a DV+. Interesting to read that the G's are still failing as info...

You could always consider and EGR delete kit from the likes of Darkside Developments. Perhaps do a remap whilst you're at it and they will throw in the EGR software delete for free.

There are loads of different software version on ECUs and this would account why some cars can have APR mobile and other's can't. If a mobile file isn't available for your specific ECU version (known as a boxcode) your APR dealer can request a an APR mobile build to be made available. You'll...

With APR you are getting 3 performance maps at the same time (95/98/104RON), free software updates and free upgrades from Stage 1 to 1+,2,2+ It's a high initial investment which can be reduced during one of their software sales, and with their industry leading APR mobile software you can...

Faulty N80 Valve (Test/Repalce) Split Pipe near EVAP canister (Visually Check and replace if split especially near EVAP connections) Clogged EVAP Canister that may need replacing Try not to over fill the fuel tank by brimming it right to the top, Stop on the first click or a bit before. This...