ok last weekend I started my car for the first time in five years,ive fitted recon steering rack,filled it with fluid and done the usual bleeding,now with the engine running if you try to turn the wheel it whips out of your hand and turns to full lock and shakes violently,if you turn the engine off with the wheels off the ground the steering is hard to turn in places then goes light,sound like an air lock but ive been on with this for hours trying to bleed it but having no joy,has anyone had this problem before?