« Reply #17 on: 16 May 2012, 02:16 »
If you've done the catch can check the breather hose which goes into the engine make sure its connected tight and sealed - might even be worth renewing that pipe and clip if not already done so.
I had a similar problem using the original hose as the outer plastic had perished making it a struggle to fit correctly.
Caused white smoke after revving while idle as seen here -
http://www.youtube.com/watch?v=Nq1t_LRvXqQ

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2003 1.8T GTI 180 - APR Stage I, S2000 Filter, R-Tech Supersize TIP, Bilstein B12 Suspension, 18" OZ Superleggera, Recaro Heated Leathers, US Spec Rear Lights, N249/SAI/PCV Delete
1.8T AUQ - 241bhp & 286 ft-lb
R-Tech Map, Forge FMIC, SFS Oversized TIP, Ported Manifold, Milltek Turboback non res exhaust, Forge 007p, N249 & N112 delete, SAI delete, S2000 Air Filter, Sachs clutch & Lightweight Flywheel