Porsche Enthusiasts Club Forum

Hope one of you guys might be able to help. When I put more than about half a turn of steering lock on even when stopped I get an awful knocking noise from the front end. The more lock I put on the worse it gets & I can feel it at the steering wheel as I kind of bounceing, take the lock off it stops. When I am moving at any speed it stops! Any ideas appriciated.

Assuming it is PAS then airlock in the pump, fluid level low, pump dying?