hey mate,

sounds like intake manifold gasket causing the shaking and extra suction

need that fixed asap. the extra air intake will be causing loads of other issues.
the fact its happening more and more really means you should get it checked before it becomes highly expensive.
i Recommend maximum motorsport in malaga - there diagnostics guy Daniel is really good.

either that or the tune is out, or your running on 3 cylinders. depending on what your running of course... could be something simple as stuffed vaccuum hose...bit of leak here and there... or your boost solenoid is stuffed.

Cheers

__________________
Ewrxion87

P-West TMIC / ecutek / HF CAI / Turbosmart / Apexi / Federal / 19psi / bc racing & whiteline / Perrin Performance / Rays