alternator and engine noise

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joselmartinez

Member - Posts: 8

Joined: October 22, 2008

Location: New York, United States

Posted: October 22, 2008 at 9:55 AM / IP Logged

hello everyone, I new in the forum and looking for some help.

I recently change all my system and after the installation i get a lot of engine noise and alternator noise.

the install was like follows:

Alternator: a 250 amp Ford alternator modified to use a voltage regulator, so it generates from 10.5 to 18 volts.

Power wire: upgrade to 0 gauge from alternator to main battery, to second battery, to capacitor, to distribution block.

Ground wire: upgrade to 0 gauge from alternator to engine, to chasis, to battery, to second battery, to capacitor, to distribution block.

Amplifiers: 1 Memphis st-1600d to subs (2 10"Ascendant Audio)

1 Autotek 500s to mids (4 5.25" Crossfire)

1 Pioneer Gm6300 to Highs (2 Crossfire - 2 Lanzar Opti)

Sound Processors: Audiocontrol LC7 to convert the signal from factory head unit

Lanzar optix 10 Crossover

All remote signal came from a switch wich it's feed from the distribution blocks.

also the ground fee for all equipments came direct from the battery, there's no chasis or metal ground.

along all this installation i ran oxigen free rca wires.

when i turn on the engine i hear a whine noise and when i trun on the lights i hear a disgustin alternator noise.

can anyone help me find out what or where did i go wrong, cause i've been strugling with this for the last 4 weeks and still the same.

I'll appreciate it.

I almost forgot that the current power to the system is 15.3v, thru the voltage regulator of the alternator, it is like that, because I'm a car service driver and we use a trunk mounted 2way radio wich uses this power to transmit at 225 watts ( the average is 65 used by goverment agencies) so you can have an idea.

supradude

Silver - Posts: 915

Joined: September 21, 2004

Location: South Carolina, United States

Posted: October 22, 2008 at 10:06 AM / IP Logged

Did you run the power wire on the opposite side from the rca's/speaker wires?

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DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: October 22, 2008 at 10:14 AM / IP Logged

You didn't list your head unit. What is it? How is it grounded? Also, is your transmitter on when any of this noise is detected? Is the ignition system in this truck fully shielded? Are any of the amps or any of the RCA cables running over or mounted near the ECU?

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joselmartinez

Member - Posts: 8

Joined: October 22, 2008

Location: New York, United States

Posted: October 22, 2008 at 11:08 AM / IP Logged

supradude wrote:

Did you run the power wire on the opposite side from the rca's/speaker wires?

yes i did.

joselmartinez

Member - Posts: 8

Joined: October 22, 2008

Location: New York, United States

Posted: October 22, 2008 at 11:13 AM / IP Logged

DYohn wrote:

I'm sorry, It is a 2005 Lincoln Town Car with the factory head unit, that's wy I'm using the audiocontrol lc7. no the transmiter is off. can you enlightme about the ignition system shield?, no wires for the amps or RCA are running near the ECU, the LC7 it's mounted on the trunk due to space availability.

joselmartinez

Member - Posts: 8

Joined: October 22, 2008

Location: New York, United States

Posted: October 22, 2008 at 11:46 AM / IP Logged

this are the pictures of the istall

**EDIT** Please include your pictures in your post.

i am an idiot

Platinum - Posts: 13,667

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Joined: September 21, 2006

Location: Louisiana, United States

Posted: October 22, 2008 at 1:49 PM / IP Logged

Bypass the Lanzar piece and see what happens.

supradude

Silver - Posts: 915

Joined: September 21, 2004

Location: South Carolina, United States

Posted: October 22, 2008 at 3:15 PM / IP Logged

These are hard problems to find sometimes. Try changing out piece by piece to eliminate which one is faulty. Start with the Lanzar like "i am an idiot" suggested first. Lanzar equipment isn't what it used to be. That could be the culprit. Good luck.

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joselmartinez

Member - Posts: 8

Joined: October 22, 2008

Location: New York, United States

Posted: October 22, 2008 at 7:50 PM / IP Logged

ok, maybe there's possibility in the lanzar, I will bypass it and see what happens, also I will heat up the welding points on the groun of all the equipments, I'll post the results...................thanks guys

wduson

Member - Posts: 5

Joined: September 30, 2006

Location: United States

Posted: November 04, 2008 at 1:03 PM / IP Logged

I have corrected my alternator whine problem recently by ultimately buying a well constructed ground loop isolator. But before you even consider that, try to ground all components (Head Unit, EQ, Amps, etc.) to a sanded down part of metal in your vehicle. Sand paper is key to removing the paint in order to get down to the metal.

No matter what, noise will be present but the level of noise is based on gains and sensitivity of your speakers. After adding a ground loop isolator to my system, there is no audible alternator whine or buzzing when headlights are on.

alternator and engine noise -- posted image.

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