Hi Folks,   My Cutlass has been sitting in the grage most of the last year since it started making a really nasty sounding noise.   Shawn (GnatGoSplat) and I have been discussing this off and on since the noise started, but I haven't actually gotten anywere in diagnosing the problem until the last month or so.   Anyway, here are the symptoms I've noted: 1) There's a noise that sounds like a loud valve noise 2) When the engine is warm, it dies at idle (I think this is a function of engin