my chain of evens were, hard left turns, then the pump started to whine, then i lost all power steering. so i changed the pump. that did nothing. but the pump stopped whining. got the used rack popped it in, bled the air from lines. ( on stands, car off i tuned the wheel lock to lock, 15 times, the added more fluid. started the car, went lock to lock 10 more times.) have had perfect p/s since.