That whistle you hear is a leak of some sort. check those two hoses that connect to the intake. After you tighten up the hoses unplug your negative battery cable for about 10 mins then reconnect it. This will reset the ecu. start the car and let it idle for about 10 mins then take it for a ride around the block. see if it is still making the weird noises. If so wait it out as you drive 50 miles over the next day or two and see if it continues. the pcm needs to readjust to the intake and it takes a little time to do it.