Radio Noise Help Needed.

Discussion in 'Car Audio, Electronics & Security' started by slayer021175666, Aug 25, 2016.

  1. RLL Z-28

    RLL Z-28 Veteran Member

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    Jul 2, 2013
    Chattanooga,Tennessee
    One other thing to check is the noise suppressor on the tach wire it's just like the one on the blower motor wire. It mounts to the firewall if you don't see one then you need one. $52.00
     
  2. slayer021175666

    slayer021175666 Veteran Member

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    Feb 29, 2016
    Idaho
    Interesting! I always wondered what that thing was! Right now I don't even have the hood on. You think if I put it on, it would solve it? Seems weird that that would be it though because, the noise is there even with the antenna wire disconnected from the radio. Hmmm
     
  3. slayer021175666

    slayer021175666 Veteran Member

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    Feb 29, 2016
    Idaho
    Umm. Would I even have one of those? My tach is an Autometer after market tach. My car didn't have a tach from the factory.
    BTW, I pulled the tach wire from the distributor and the noise is still there.
    Thanks a lot.
     
  4. slayer021175666

    slayer021175666 Veteran Member

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    Feb 29, 2016
    Idaho
    Actually, why is it even necessary to ground the hood to the cowl? Shit. This problem just gets more confusing.
     
  5. twozs

    twozs Veteran Member

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    Aug 5, 1999
    hopewell jct ny
    The hood ground was on the early electronic ignition cars 74 and up . The tach filter was to regulate the signal from the tack to the gauge and had nothing to do with the radio interference .
     
  6. slayer021175666

    slayer021175666 Veteran Member

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    Feb 29, 2016
    Idaho
    My ground piece is there but, my hood if off right now. Two questions:
    1. If I put the hood on will the noise go away?
    2.Why does the hood have to be grounded?
     
  7. twozs

    twozs Veteran Member

    8,418
    78
    Aug 5, 1999
    hopewell jct ny
    I don't think it has much to do with your problems. Is the body of the radio grounded ? Engine noise through the radio is normally a bad ground .
     
  8. slayer021175666

    slayer021175666 Veteran Member

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    Feb 29, 2016
    Idaho
    Ya. grounded at 3 points. Body of radio, radio ground wire and antenna.
     
  9. RLL Z-28

    RLL Z-28 Veteran Member

    188
    6
    Jul 2, 2013
    Chattanooga,Tennessee
    That ground is for the radio and nothing else, it should have nothing to do with electronic ignition cars. Here is the one I bought for my car ebay item #350490941671 it's for 1968-1988 GM cars. I have no more noise coming from my am/fm 8 track since buying this I can't say if it will work for you but it did for me. I went back and reread your post if there is no engine rev coming through when you mash the peddle then you should find the problem in your radio, speakers, or antenna. Just one mans opinion good luck.
     
    Last edited: Aug 27, 2016
  10. slayer021175666

    slayer021175666 Veteran Member

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    Feb 29, 2016
    Idaho
    IDK. I'm flummoxed! I don't see why the hood needs to be grounded or the antenna needs to be grounded to the hood or whatever the case is. Seems like you could ground the antenna to ANY body panel. Grounding the hood for an engine compartment light, I can understand. Grounding the hood for the antenna has me baffled.
     

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