I own a 1992 Lexus sc400. I've noticed recently the power stering has started leaking, I add power stering fluid it stops, after 3-4 days the fluid is low and it starts to squel again, I add more fluid and it stops and the same thing all over again. I'm a female and I don't want to get ripped at the dealership. Do you think it's the actual power stering pump or the lines?