Engine Noise through AUX port

[Deldran]

So i just noticed this morning that if i have my phone plugged into the AUX port and playing music i get engine noise through my speakers. It like if you grounded and amplifier to the frame in an old car. It whines and it gets louder the higher the rpms are. Anyone else have this issue?

[Chimmike]

wire a better ground?

[pebenito]

A ground loop isolator may help too.. only like $5-$10, and you plug it inline between your aux port and phone.

[Deldran]

Originally Posted by chimmike wire a better ground?

This is all factory to my knowledge it is the factory ground i would think it should be good.

I might try the ground loop isolator. can you pic those up at radio shack or something?

[Cataphract_40]

Amazon.com: Kensington Noise Reducing Car Audio AUX Cable for MP3 or SmartPhone, including iPhone 4S: Electronics

Amazon.com: Kensington Noise Reducing Car Audio AUX Cable for MP3 or SmartPhone, including iPhone 4S: Electronics
Amazon.com: Kensington Noise Reducing Car Audio AUX Cable for MP3 or SmartPhone, including iPhone 4S: Electronics

[Deldran]

Cool thanks

[kmac]

If u r charging the phone at the same time It's normal to generate rf.

[UnknownSuperhero]

^ this.

I was just going to ask, are you charging at the same time?

[Deldran]

Nice i was charging the phone. That sucks but makes sense. thanks
Would the ground loop isolation eliminate the noise while charging?

[deuce_WI]

I get the humm when charging from a normal car charger and playing audio to the aux port. When not charging it sounds great.

My option B - I have a small inverter in the center console. If I use a wall charger off the inverter for power, no humm. (basically a work around to give me an isolated circuit)

[daafisch]

Originally Posted by pipefan88 Nice i was charging the phone. That sucks but makes sense. thanks Would the ground loop isolation eliminate the noise while charging?

Yes

I used this one when I had my stock radio

Amazon.com: PAC SNI-1/3.5 3.5mm Ground Loop Isolator: Everything Else

Amazon.com: PAC SNI-1/3.5 3.5mm Ground Loop Isolator: Everything Else
Amazon.com: PAC SNI-1/3.5 3.5mm Ground Loop Isolator: Everything Else

[SofaKingAwesome]

Originally Posted by kmac If u r charging the phone at the same time It's normal to generate rf.

This will do it every time.

[hank25]

Interesting, great advice thanks!

[radioflyer]

I've installed many hi end stereos and had this problem many times. My advice to you is If you're running an amplifier, run power and ground all the way to the battery. Same for the headunit, run the yellow wire to the positive terminal on the battery as well as the black wire all the way to the battery as well. Ground loop isolators reduce audio quality and are filtering a perfectly good signal. If you're running an amplifier, buy high quality RCA's like the ones I listed. These are twisted in a such a way that is deters noise and loss of signal quality. Also if you're running RCA's, pull the carpet out one day and run them down the middle of the car and away from any wires as best you can, this will make a huge difference in signal nose. Hope this helps, its always worked for me.

Amazon.com: SPI6312 - Stinger Pro 3 Series 6 Channel 12' RCA Interconnects: Electronics

Amazon.com: SPI6312 - Stinger Pro 3 Series 6 Channel 12' RCA Interconnects: Electronics
Amazon.com: SPI6312 - Stinger Pro 3 Series 6 Channel 12' RCA Interconnects: Electronics

[Jarods7920]

Run the power and ground from the battery? Are you kidding? The battery is one of the noisiest/dirties places for power.

The only way to get rid of the issue is not use the circuit when you are using the aux cable, or completely isolate it.

[Constantin]

Originally Posted by daafisch Yes I used this one when I had my stock radio Amazon.com: PAC SNI-1/3.5 3.5mm Ground Loop Isolator: Everything Else

I have read the complaints about Rado Shack's Ground Look Isolator that is cuts out all bass. Did you or anybody had the same experience?

[daafisch]

Originally Posted by Constantin I have read the complaints about Rado Shack's Ground Look Isolator that is cuts out all bass. Did you or anybody had the same experience?

It may have cut out some but definitely not all. It's been a while since I've used it.

[GoBackToSleep]

I experienced this same issue since I just got my first Droid phone on Friday and I was enjoying the hell out of Pandora by way of the AUX port. Like others said, it's a matter of whether or not you're charging your phone at the same time. Since I take longer drives every now and then, I thank whoever posted about the isolators and other work-arounds. With my A/C adapter at home charging the phone while listening through speakers or headphones, I noticed the problem doesn't exist since the power is better grounded and running through a surge protector.

Very useful information in this thread, I'd say.

[thwrightstuff]

I am having this same issue, but I'd rather not buy an isolator. There has got to be an easy way to reground the auxilary plug to the car, maybe a larger gauge wire with shielding to reduce feedback pickup. Does anyone have access to a wiring diagram for the MS3 or at least to the factory auxilary/stereo unit?

[radioflyer]

If this happens primarily when the charger is plugged in, wiring the charger to the battery can help significantly. Next best thing would be an aftermarket headunit with a USB port on it to charge said device.

[thwrightstuff]

I mean, I guess I could hardwire the power, but it's the Belkin Aircast device, so it'd be a pain to try to do that. I'm surprised there isn't any easier option than that.

[Constantin]

I'v been told that if you use stereo's ground for the ground on your phone charger the "noise" should be gone. No need for isolator. I'll try it one if this days

[gs1150]

Originally Posted by Constantin I'v been told that if you use stereo's ground for the ground on your phone charger the "noise" should be gone. No need for isolator. I'll try it one if this days

I got around this by charging my phone with an external battery/charger that I keep in the glove box. Its very slim and small , its like 6500 ma and keeps the phone charged for as much time as I have ever been in the car. When I leave, I plug in the external battery pack to re charge