Hey...i had ALLLLLL of these symptoms, but guess what......i bought the car 2 months ago from some fumb teenager that didnt know what he was doing. Turns out that all the whistling was coming fron the intake manifold...i checked it only to see that nthe bolts were loose as hell.....i could of unscrewed them with my fingers!!!! all the air was leaking from the loose intake manifold!! so i tightened it up all the way and now my car is PERFECT!!!!! nothing is wrong with it now!!!! EVERYONE CHECK TO SEE IF IT IS ON THERE TIGHT...YOU MIGHT HAVE THE SAME PROBLEM!!!! GOOD LUCK GUYS!!! IM SO HAPPPYYYYYYY