The power steering and AC belt has to be extremely tight it also is best to use a premium belt. There is a tab on the power steering pump for a 1/2 in breaker bar. On my 95 (with a 99 engine) I also had the alternator belt slipping when the AC cycled. It was caused by the load of the cooling fans. It drove me nuts as I kept tightening the AC belt and it would still do it.