Radio noise - please help!

[threetone]

Hi everyone,

I’m looking for some advice from you technical / electrical wizards.

I’m experiencing severe problems with my radio in my Cali. I’ve included a video link to better explain the problem.

When i start the engine from cold, everything is fine and as it should be.
However, when the engine reaches the temperature of about 90 degrees, after 10-15 minutes or so, i hear severe and loud hissing noise from my stereo.
Also, when i rev, i can hear the car revving through the speakers!
If i turn the engine off with radio on, the hiss continues until i take the key out of the ignition.

If i restart, the hiss comes back.

This makes my car stereo unusable of course.

Does anyone savy recognise what is going on here?
Any advice on where i should check?
It has been this way since a bought it one year ago, but i’ve been too happy camping to let it bother me, now i’m determined to fix it.


All the filming was done from a standstill.

Thanks everyone !!!!

 

[TripleBee]

As it is no original unit, try to unplug it.
If the noise is gone with the unit unplugged, it's some interference from the badly EMC shielded unit with the engine.
I don't have this problem, so I would not know what is really going on here.

 

[westfalia]

Could it be the earth cable from the radio?

 

[Calitreks]

Do you have digital voice enhancement on the stereo ? If you do and that is switched on that could explain the noise of engine coming through speakers ?

Do you have a dashcam or other unit with wiring going past the stereo ? A ferrite core was supplied with my dashcam to prevent interference with DAB or FM signal.