Engine Noise Caused by Radio Antena help

[dragonware 10+ year member]

i went through all the troubleshooting of inline noise filter, moving all power wires on one side new RCA cables grounding deck and EQ, grounding the amps etc still no help.

When I remove the antena from my Head unit JCV-40XD the noise is gone, plug it back in its back.

What can i do to fix this without someone telling me to leave the antena out as i play USB mostly but still want radio also.

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[dragonware 10+ year member]

bump sigh always ignored.

 

[robert420 10+ year member]

im not too experienced with antenna wires, as i never use them, im all for aux cables or usb...

im assuming your running an aftermarket HU... do you have an antenna adapter to fit it properly?

if so, try wrapping the metal end of the antenna input with a piece of wire, and ground it out to where the HU is grounded out at

 

[dragonware 10+ year member]

yes I have an adapter that came with the after market Head unit.

At what point are you telling me to wrap the wire at and ground it out ?

the part that goes inside the radio would that still fit or just force some speaker wire in there n bolt it to the metal somewhere ?

 

[robert420 10+ year member]

the metal piece that goes into the HU. plug it in, then wrap the wire around the metal trim on the antenna input. then ground it out

 

[dragonware 10+ year member]

will update once i try it later this evening

 

[robert420 10+ year member]

sounds good.

 

[dragonware 10+ year member]

Update, I wrapped the F*ck outa the adapter any exposed parts, I also wrapped the bottom of the plug where it conects into the head unit. I wrapped some around the output RCA. and grounded it off.

I wont say it didnt help. about 80% of the noise is gone now any other suggestions.

It is a ford focus 2008 with roof mounted antena.

 

[robert420 10+ year member]

it might also be the antenna its self. my mom has an 01 pontiac montana with like a 3 inch long roof antenna... whenever i drive through town with buildings on both sides, its really distorted

 

[i2ain2thunder 10+ year member]

Do you have the engine noise when the HU is on anything other than radio?

 

[dragonware 10+ year member]

yes its also on USB, front Aux and Radio //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[i2ain2thunder 10+ year member]

I am not sure here this sounds a little funky. As I understand it you don't have engine noise if you remove the antenna connection on the back of your headunit, and do when you have that attached. You want it attached, and when it is you get engine noise regaurdless of the source.

Normally with engine noise it has to do with signal wires (RCAs) being too close to power wires. Sometimes some HUs don't ground their HU's very well and you can try grounding the RCA connection on the HU. If those 2 things aren't the issue, it's possible that is just a bad headunit and a different one will solve all of your problems.

 

[dragonware 10+ year member]

or turn up my volume i cant hear the noise.

 

[robert420 10+ year member]

do you have the rca wires running at least 18 inches away from your amp power wire?

 

[dragonware 10+ year member]

All speaker and RCA cables are on the right side of the car, Remote wire and power wires are on the left side