I recently bought my first W-body: a 1990 Oldsmobile Cutlass Supreme SL with the 3.1L/auto and 110K miles on it. The car appears to have seen reasonable care for most of its life.
Tonight I found out the mysterious leak under the hood is power steering fluid, which seems to be spraying out from UNDER the power steering reservoir cap. At idle when you turn the wheel, fluid sprays out from under the cap. It's made a mess underhood (I just degreased everything) and seems to me that the pump is over pressure. I could hear pressure relief when I took the reservoir cap off. Any idea what is going on? I've never dealt with a steering issue before. I looked thru my GM manual, but it does not have a troubleshooting section (one good thing the Haynes and Chilton's manuals have). Any input is appreciated.