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  • Engine Noise with M2 ATX

    Does anyone here have engine noise with there M2 ATX, if so how did you get rid of it. The ground is good. Any help will be greatly appreciated.
    Lucky1

  • #2
    i had it and couldnt get rid of it now my atx is broken.

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    • #3
      I Had it, got rid of it in like 2 seconds, (Axagarated)

      First, check all grounds, check your PC soundcard with headphones, if you are still getting the whine, then it is the PC, next, check the amps (If any)

      If you have checked everything and still cant get rid of the whine, buy a device called a ground loop isolator IT DOES WONDERS! i checked all my grounds but couldnt find the prob, i ended up buying a loop isolator and wham, no noise

      BTW, this is in a FAQ somewhere, thats where i became knowledgable in the PSU subject

      Hope this helps.
      70% Completed

      You Are Unique...Like everyone else!


      My Worklog:

      http://www.mp3car.com/vbulletin/showthread.php?t=88246


      To do list:
      GPS
      Engine diagnostics

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      • #4
        if you still getting noise get a ground loop isolater. Cost like 15 bucks and fix your problem

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        • #5
          Hey guys, i also have a M2-ATX with noise BUT i also have noise on the screen. I tried a separate car battery and then i have clear audio and video. The audio noise starts during the bootup when the XP logo comes up and then after a few seconds (probably when the Sound is activated). Does a Ground Loop Isolator also cure screen problems?

          I purchased a lot of stuff already but not a GLI yet. I also tried a large 1 farad Capacitor and a Large spool today but no real difference.

          One thing i also wonder about a GLI is doesn`t the switched 12v+ be run through a GLI also? Cause most GLI`s i have seen are for the audio only, or am i mixing 2 things????
          If you`re not first, you`re last !

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          • #6
            Originally posted by Gamer64 View Post
            Hey guys, i also have a M2-ATX with noise BUT i also have noise on the screen. I tried a separate car battery and then i have clear audio and video. The audio noise starts during the bootup when the XP logo comes up and then after a few seconds (probably when the Sound is activated). Does a Ground Loop Isolator also cure screen problems?

            I purchased a lot of stuff already but not a GLI yet. I also tried a large 1 farad Capacitor and a Large spool today but no real difference.

            One thing i also wonder about a GLI is doesn`t the switched 12v+ be run through a GLI also? Cause most GLI`s i have seen are for the audio only, or am i mixing 2 things????
            GLI goes in the audio cables, Alternator Noise Suppressor is for for the power wires.

            Usually, a GLI will suffice, if not, try an ANS, or both.

            Michael
            ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

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            • #7
              If there is noise through your screen even though it is powered through your computer's power supply, the problem is more likely to be a bad ground for the computer. To check for noise from the computer's sound card, you can always just use a pair of headphones to listen for it. You can always beef up the ground points of any car by replacing stock ground wires with higher quality wire /thicker guage/more grounds. Through my experience with car audio, I have never induced ground noise from running long lines of rca's or power cables, only from bad ground points.

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              • #8
                Yeah, it`s really strange. I also made a cable that went directly from my battery to my Car PC. Didn`t solve it either. I also bought a big Capacitor (that are usually for amplifiers). I thought that could maybe help to always have enough power buffered. But no, didn`t work either . Also a normal spool inline with the 12v+ didn`t make much difference.

                I have a Bose Sound System in my car. It looks and sounds good, is completely integrated in the car including display and cd changer etc, but its totally crap to expand with other stuff .
                If you`re not first, you`re last !

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                • #9
                  Yeah, it`s really strange. I also made a cable that went directly from my battery to my Car PC. Didn`t solve it either. I also bought a big Capacitor (that are usually for amplifiers). I thought that could maybe help to always have enough power buffered. But no, didn`t work either . Also a normal spool inline with the 12v+ didn`t make much difference.

                  I have a Bose Sound System in my car. It looks and sounds good, is completely integrated in the car including display and cd changer etc, but its totally crap to expand with other stuff .

                  SORRY FOR THE DOUBLE POST, MY BAD (i think)
                  If you`re not first, you`re last !

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                  • #10
                    I used to get a lot of hard drive/input noise in my audio system until I attached a ground wire directly to the case screw on my sound card. Now there is just a faint whine until the computer boots, then nothing. I just need to put in an amp turn on delay.

                    Adding a Cap does nothing for line noise. Wiring the ground directly from the battery doesn't either (chassis grounds are just as good). Your problem is that your PC thinks that routing electricity through the audio wires is easier than through your ground wire(s). Think of it that way, and figure out how to make it easier for your PC to drain through actual ground wires.

                    Thick wires, short runs, bare metal to metal contacts to chassis (not body panels)

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                    • #11
                      I use the onboard sound card. So you mean connect a ground wire directly to the metal housing of my headphone/line/mic input on my mobo? Would that work also?
                      If you`re not first, you`re last !

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                      • #12
                        The audio noise is now cured with my new Ebay GLI. Only noticible slightly when music is paused and the volume is at max. But the screen noise is still there. I really need to find a goud ground point. Hopefully that will solve the problem.
                        If you`re not first, you`re last !

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                        • #13
                          I have screen noise aswell and want it gone.
                          Im gonna move some wires around a bit.

                          Tried getting advice at a car audio installers but the y just wanted to sell me stuff.

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                          • #14
                            did you upgrade the ground wire from your battery to chasis? Sometimes that can make a huge difference, especially if you have alot of power draw from the positive side of things. I even went as far as upgrading the ground from my chasis to engine/alternator (overkill) but my system is quiet as a mouse...

                            Oh yeah, ground loop isolators can work wonders, but sometimes they can also eliminate the sound you want to hear... they are a cheap fix but they never really do "fix" your problem, which are your ground wires...
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                            • #15
                              No, i haven`t done that (yet). But what i did to test was a direct cable from the battery and that didn`t solve it either.

                              Someone said that wiring directly from the battery isn`t the best way, could someone explain why that is, because it seems to me that that`s the most direct connection it can get.
                              If you`re not first, you`re last !

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