Whining noise thru the fm receiver

What you're hearing is alternator whine. The frontend of the amp in your tunes is reacting to dirty power from the car and passing it through to your speakers. It's pretty common, but it's usually "caught" and remedied by stock components.

It can also a ground problem. add or check grounds.

OR

If you recently changed anything like plugs, wires then did you get RF suppression versions? If you still have the old spark plug wires, switch them back and see if the noise goes away. While not the root cause it could also be a diode is going out on the alt. or capacitor is failing in the audio system's power supply

Head to Radio Shack and pick up a "noise suppressor" kit. It'll consist of a non-polarized capacitor and an isolation transformer.