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High pitched whine at first start is the secondary air pump. It pumps air into the exhaust manifold at the same time the engine runs rich- this excess fuel and o2 burn in the cat greatly decreasing the time it takes for the cats to start functioning. This is normal- however, if the air pump hose disconnects, your engine will seam to run like crap upon startup. To the OP: longshot, but check your ground strap? Goes to the airpump bracket on top of the engine right side. Otherwise, try cleaning your throttlebody. Possible intake leak? Should be throwing o2 sensing codes if bad enough to cause these issues though- at least with OBD2 cars
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