I am having the same problem with my 95 ES300, even with a new steering pump. The fan not spinning at the right speed. It is supposed to get faster when u turn on the ac. Do u have the same problem with the ac off. I don't think u will. Try it and see. I am going to solve this problem by putting in a small electric fan, controlled by an alternate power source. Im doing this because even the dealers made me have to spend money, and it still did not solve the problem. With hydraulics, it could be even the pipes and hoses that affect the fan's velocity. It will take too much of my time to let them fix it, so I'll just do it the electronic way.
