OK so I've had my mk2 BA 6 speed off the road for about 6 months, had to replace a few rear bushes so me and a mate pulled the rear cradle out etc. Anyway it started having pressure problems, as old mate I bought it off had it tuned to 16psi, and it stopped boosting altogether. the pressure problem has been fixed, but now when it starts hitting full boost it feels like a cyclone is pushing me side to side. the car sat for a little too long so it has minor flat spots. Has anyone experienced this before? im thinking tyres are cooked or possibly wheel bearings? everything feels tight under the ass end with the spanners so dont think its got to do with my incompetence reinstalling the cradle. TIA