Okay, here's the deal:

I oftentimes hear a whistling/hissing inside the cabin of my car while driving. It increases as the RPMs increase and decreases accordingly. I thought this was due to my intake, because it happened on my old car (although it's MUCH more pronounced on the Prelude).

Anyway, the other day I turned the VOLUME all the way down on my stereo, and the whistling DISAPPEARED. I am totally confused as to what causes this, but here's a recap:

-whistling noise
-appears related to the RPMs
-disappears when volume on radio is turned to 0 or stereo is off.....

Oh, I have a Pioneer DEH-840MP, if that matters. Any help? I'm baffled.

 

I could be wrong but I believe that a bad ground is causing it.

 

What kind of radio / system do you have? I agree, the gounding is more than likely the problem.

 

engine noise/whine is a bad ground, hence grounding is the problem.
first make sure your amp power is separate from your rca or speaker wires. don't run them next to each other if you can help it.
make sure your amp is grounded well.
also look into those ground loop isolaters. i used some that filter the rca cables, and they didn't work too well. there is a better one available that connects at the battery or alternator. check out jcwhitney and look for noise suppressors.


Modified by Jagan'92 at 1:45 PM 8/13/2003

 

its engine noise/whine. its most likely that the power wires and rca's/speaker wires are too close somewhere. make sure u ran the power wires opposite from rca and speakerwires. if it is opposite sides, make sure the wires arent crossing or close to each other when wiring up the amp. check ground too, but i doubt its bad ground

 

All I have in my car is the head unit, no aftermarket amp/speakers/woofers.

I'll call my shop tomorrow and ask them if they agree with the opinion here and have them take a look at it. Thanks for the suggestions, everyone.

 

It is deffinatly a bad grounding problem. The only other thing I can think of is that I had an old sony deck that was doing the same thing to me and it ended up being a bad head unit. Check grounding first as it is the cheapest route to troubleshooting your problem. Hope you get this fixed that noise drove me insane