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Old 07-14-2003, 07:13 AM   #1
Lee

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Engine Noise Flowchart

Engine Noise Flowchart

I started building this back in '97 -- ok, I actually built it in a day back in '97 -- updated the copyright in '98 and haven't really added anything to it, or finished it, since.

I would like to see it corrected and completed. If you see anything in it that needs correcting, please post it here -- also, if you think you can make some additions to it to help complete it, post them here as well. I will integrate them into the finished product.

I hear from people all the time that have found this useful. I probably would be more so if complete.

Let's see some feedback from you guys that actually know something.
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Old 07-31-2003, 05:12 AM   #2
Sid Grice

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Quote:
Turn the gains on your amps up three quarter, now with the engine running, turn the system ON, and turn the volume all the way down. Slightly reving the engine, do you hear noise?
You should begin by testing the minimum and maximum adjustment for the gain adjustment, and making sure the person performing the test is somewhat familiar with electronics.

Quote:
With ignition key in the off position, locate the gain adjustemt screw (or dial) for the amp that is suspected of creating the noise. Using a non metalic tool (Electroinics screwdriver), turn the gain adjustment fully clockwise. Make note of the final postiton of the adjustment screw. This will be known as the maximum setting for the amplifiers gain. Now, turn the gain adjustment fully counterclockwise. Again, note the final postion of the adjustment screw. This will be know as the minimum gain adjustment.

Once the minimum and maximum setting is known, start with the gain setting in the minimum position and begin rotating it clockwise until the screw is set at 3/4 of maximum position.

Once the gain for the suspected amplifier has been set, start the vehicles engine. Turn on the radio, and adjust the volume control to its minimum setting.

Turn off any accessories that may generate noise (such as the A/C fan motor), that could interfere with the test procedures. While listening for any uncommon noise, gently accelerate the engines throttle. Do you hear a noise, that is directly proportionate to the throttle of the engine?

As you can tell, I would not be able to assist you in your quest. I am unable to render an shortened version. But, I do wish you luck in getting the flowchart finished.

Last edited by Sid Grice; 07-31-2003 at 05:16 AM.
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Old 09-14-2003, 01:33 PM   #3
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Hi guys, i new to the forum but i have been involved in the auto audio industry some years now, and I apologise for my accent & spelling (trunk = boot, to me). Anyway back to setting up your system and getting rid of the NOISE.

Q. if you have the engine running and the system on does the noise change it frequency as you rev the engine, and does the noise get worse if you turn on lights and air con. ?

Q where have you run RCA cable in relation to power cables (audio and vehicle OE fit)

Q have you terminated the source unit's earth on the earth terminal for you amp(s), and not in the original loom.

Q did you use a clean connection for you earthing terminal

I may have asked a few basic questions that someone else has alredy asked, if i have i can only apologise, but I hope that this may have helped, if I can be of any further help please " Holla "??

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Old 10-03-2003, 02:35 AM   #4
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Quote:
Originally posted by No Bull please
Hi guys, i new to the forum but i have been involved in the auto audio industry some years now, and I apologise for my accent & spelling (trunk = boot, to me). Anyway back to setting up your system and getting rid of the NOISE.

Q. if you have the engine running and the system on does the noise change it frequency as you rev the engine, and does the noise get worse if you turn on lights and air con. ?

Q where have you run RCA cable in relation to power cables (audio and vehicle OE fit)

Q have you terminated the source unit's earth on the earth terminal for you amp(s), and not in the original loom.

Q did you use a clean connection for you earthing terminal

I may have asked a few basic questions that someone else has alredy asked, if i have i can only apologise, but I hope that this may have helped, if I can be of any further help please " Holla "??

i think u mean grounding....... not earthing.
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Old 11-14-2003, 07:16 AM   #5
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If you hit "NO" on the first page/question, it's a 404 error!
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Old 12-24-2003, 05:19 PM   #6
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Why does this thread have almost 1000 views? wtf
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Old 01-28-2004, 09:58 AM   #7
shootme5150

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Quote:
Originally posted by micray83
Why does this thread have almost 1000 views? wtf
I've referred numerous people to this thread because it's the only link I know of to the actual flowchart...
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Old 03-03-2004, 01:05 PM   #8
SoundsGood

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Quote:
Originally posted by Boardin087
i think u mean grounding....... not earthing.
In European and many island nations a ground in an electrical connection is referred to as earth.
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Old 03-22-2004, 01:21 PM   #9
caraudio nutt

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Quote:
Originally posted by Boardin087
i think u mean grounding....... not earthing.
If you have been in the field for a long period of time, why do you call the ground "earthing"?
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Old 03-22-2004, 01:25 PM   #10
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Quote:
Originally posted by No Bull please
Hi guys, i new to the forum but i have been involved in the auto audio industry some years now, and I apologise for my accent & spelling (trunk = boot, to me). Anyway back to setting up your system and getting rid of the NOISE.

Q. if you have the engine running and the system on does the noise change it frequency as you rev the engine, and does the noise get worse if you turn on lights and air con. ?

Q where have you run RCA cable in relation to power cables (audio and vehicle OE fit)

Q have you terminated the source unit's earth on the earth terminal for you amp(s), and not in the original loom.

Q did you use a clean connection for you earthing terminal

I may have asked a few basic questions that someone else has alredy asked, if i have i can only apologise, but I hope that this may have helped, if I can be of any further help please " Holla "??

You should have told him that he or she should have sanded the paint so they have a good ground. Make sure you have picked a spot that grounds to the frame of your car.Make sure the connection is solid and not loose!!!!
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Old 05-06-2004, 05:49 PM   #11
Faruchos

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Does anyone know exactly what makes the sound, or what the interfearence is? Is the engine interfearing with the 4 gauge power wire, or the rca's?
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Old 05-27-2004, 03:28 PM   #12
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will grounding a capacitor and amp in different locations cause a whine that does not gain volume at all ?
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Old 10-01-2004, 01:41 PM   #13
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I get a 404 error.
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Old 10-10-2004, 04:03 AM   #14
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i also get a 404 error
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Old 11-04-2004, 12:45 PM   #15
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page not found
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