Why Is My Car Making A High Pitched Whistling Noise. First suspected air-con bearing then carburettor and lastly found to be leak from intake manifold. Of course its difficult to diagnose a noise without listening to it but it sounds like youre engine is trying to pull air through a passage that is not quite closing up.

These sides contain Freon at either a high or low pressure. The frequency of the sound is dependent on the length of the whistle. Special tools are sometimes needed to locate the source of a noise such as Electronic Ear Sensors.
When you turn off your car the Freon from the high-pressure side seeps back into the low-pressure side ultimately creating a hissing noise.
One of the major reasons why your car may be making that whining noise is because there are transmission issues. The whistling noise from the transmission could be either a thrust bearing failing or a clutch pack is slipping under certain conditions. High pitch whistling sound from engine. Then check to see if the noise is happening in D 3 2 L and R.
