Has anyone ever done a test on the power steering system? I have a '94 Z28 that's looses boost after half a turn of the wheel. I rerplacesd the pump a year and a hlaf ago and the rack last week with no changes.

A friend gave me a tool to check pressure, it get's connected to the valves at the pump and then the rack (I'm being deliberately breif in that description) and the pressure is measured under different circumstances.

I have a Hayes book but it doesn't have anything about these attachment points for the tool. The directions that came with the tool are very clear and presice, but has no diagrams so I'm not sure where to attach it. Has anyone ever done this or know where I can find more detailed info about this. Thanks.