engine noise problem?

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attackdog

Member - Posts: 17

Joined: November 07, 2002

Location: United States

Posted: January 09, 2005 at 1:57 AM / IP Logged

Hello everyone. I installed a DVD system in my Yukon and have a big problem with the audio portion. I am using a wireless fm modulator with the system and cannot get rid of the engine noise. I made sure that I scraped away paint for the groung wire because that is usually the cause of engine noise ( having a bad ground ). You can pick from any radio station frequency with the modulator. Any ideas would be appreciated. I can't stand the poor audio quality. Thanks to all in advanced.

sparkie

Platinum - Posts: 2,061

Joined: November 06, 2003

Location: Canada

Posted: January 12, 2005 at 5:31 PM / IP Logged

Install a power line noise filter on all video equipment's ignition wires. Install a RCA style ground loop eliminator on the FM mod's audio input.

sparky

hurtado_roberto

Copper - Posts: 196

Joined: July 30, 2004

Location: United States

Posted: January 12, 2005 at 5:43 PM / IP Logged

Is it a alternator whine noise? You only installed the DVD player and a screen right. You didn't install anything that would draw alot of current. Did you route all your power cables away from signal cables including the stock wires.

With an FM modulator you can't get the same quality if it were directly wired to the HU. It will sound ok but there might be some hissing at louder volumes.

Do the noise filters really work? I've never used them so I'm still wondering if you should buy some. Do they have to go on the power, accesory, and illumination (if available) power cables as close as possible to the unit being powered?

Poly Dollies

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Jay T

Copper - Posts: 169

Joined: December 02, 2003

Location: Canada

Posted: January 12, 2005 at 9:44 PM / IP Logged

Just another note for the ground..... Make sure its on the "chassis" I've seen people ground thier screens / players on the support cross members running along the roof of the vehicle. These always have some kind of flexible insullation / goop to prevent direct contact when they join with the side of the chassis. I'm pretty sure this is due to natural flex in the vehicle when driving and prevents rubbing etc. But this also means you don't get a good ground.

This of course only applies if you've roof mounted this.

hurtado_roberto

Copper - Posts: 196

Joined: July 30, 2004

Location: United States

Posted: January 13, 2005 at 4:55 PM / IP Logged

Is there a problem with grounding to the wheel well on some cars too? Is it common with certain models?

Poly Dollies

Jay T

Copper - Posts: 169

Joined: December 02, 2003

Location: Canada

Posted: January 13, 2005 at 7:15 PM / IP Logged

I don't see the wheel well being a problem, except that if your ground screw is sticking right out the exterior of the well, its exposed to the elements, and will probably corrode over time you might have to take it off re-sand it clean and crimp a new connector on.

hurtado_roberto

Copper - Posts: 196

Joined: July 30, 2004

Location: United States

Posted: January 13, 2005 at 7:42 PM / IP Logged

What do you think of grounding within a one foot radius. Having multiple wire's coming out of the amp screwed down on various locations. Is this a good idea or will it produce a ground loop?

Poly Dollies

Jay T

Copper - Posts: 169

Joined: December 02, 2003

Location: Canada

Posted: January 13, 2005 at 8:23 PM / IP Logged

There is no need to run more than one ground wire, as long as the connections are clean and the wire gauge is equal to or bigger than the power wire supplying current.

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engine noise problem?

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