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    speaker crackle

    HI,
    Im still trying to source the cause of my annoying speaker crackle,only when engine running ,perfect when not

    So far I have illiminated

    Fuel pump
    Alternator
    Ariel and earth
    visuall check of wiring
    Added extra earth to head unit,
    Auto elec ,who wired battery perm input (yellow out) to fuse box to illiminate dirty feed.,didnt work
    Interference suppressor kindly supplied by froum member

    My last stop is trying to illiminate the tacho as a source as this has the Spyda conversion for the Mk1 tach .with signal feed from
    My question:

    will the car run if I disconnect the feeds(white female -male bullets? ​​​​​​because on the original MK1 config .if you disconnected leads I think the green it will not run.

    the idea being if its the Spyda module causing the crackle if its disconnected should stop the problem.


    TIA
    Mark















    9to the tacho,because on the original MK1 config .if you disconnected leads I think the green it will not run

    #2
    HT leads ?

    Comment


      #3
      Not replaced those as they only done about 7k miles and where from LD parts,so have assumed ok but may have to try that,although the crackle doesnt increase with revs

      Cheers

      Comment


        #4
        Hi Maverick

        I eventually tracked my crackling down to a short from brown cable from alternator onto exhaust manifold. Just a thought.
        Cheers Mac

        Comment


          #5
          Originally posted by macstag1 View Post
          Hi Maverick

          I eventually tracked my crackling down to a short from brown cable from alternator onto exhaust manifold. Just a thought.
          Cheers Mac

          thank you will check,how did you spot it? did you run it at night to see it ,spark from the short?

          Comment


            #6
            Hi again, I found it just by chance. I was stripping out the engine bay prior to spraying and as I pulled back the cables after unplugging them from the alternator I saw the melted insulation. Strangely I hadn't noticed any other symptoms, but a lucky find for all sorts of reasons. I had previously tried everything to track down the crackling, even changing the voltage stabiliser for a solid state one. I guess a clue was that I still had the crackling when I had my phone plugged in and was listening to my own stuff, so it wasn't an interference of the signal.

            Hope you find the cause as it is most frustrating, especially after you think you have sorted all the other problems.

            Cheers Mac

            Comment


              #7
              try the HTC leads, but we had to fit an earth wire from the bonnet to the body on some mk2 escorts as they were causing a problem, worth a try if all else fails

              Comment


                #8
                Originally posted by macstag1 View Post
                Hi again, I found it just by chance. I was stripping out the engine bay prior to spraying and as I pulled back the cables after unplugging them from the alternator I saw the melted insulation. Strangely I hadn't noticed any other symptoms, but a lucky find for all sorts of reasons. I had previously tried everything to track down the crackling, even changing the voltage stabiliser for a solid state one. I guess a clue was that I still had the crackling when I had my phone plugged in and was listening to my own stuff, so it wasn't an interference of the signal.

                Hope you find the cause as it is most frustrating, especially after you think you have sorted all the other problems.

                Cheers Mac
                Thanks for your imput Mac,its helpful

                Regards

                Comment


                  #9
                  Originally posted by Phil S View Post
                  try the HTC leads, but we had to fit an earth wire from the bonnet to the body on some mk2 escorts as they were causing a problem, worth a try if all else fails
                  Phil,thanks,I assume you mean High Tension leads H.T ?

                  Comment


                    #10
                    Mark.
                    If the crackling is constant and doesn't alter in any way with the speed of the engine, I think you can rule out the charging system and the ignition. For the moment I can't think what else it could be.
                    Mike.

                    Comment


                      #11
                      Originally posted by Lingen View Post
                      Mark.
                      If the crackling is constant and doesn't alter in any way with the speed of the engine, I think you can rule out the charging system and the ignition. For the moment I can't think what else it could be.
                      Mike.
                      cheers mike ,i agree it must be a short somewhere,but where,although the crackling is sort of every few seconds rather than constant and sounds rather like listening to a vynal record with scratches

                      Comment


                        #12
                        Maybe fuel pump or arcing in the inertia switch. Also voltage regulator contacts arcing every few seconds

                        Comment


                          #13
                          Originally posted by mallardstag View Post
                          Maybe fuel pump or arcing in the inertia switch. Also voltage regulator contacts arcing every few seconds
                          Ive illiminated the fuel pump,is the voltage reg the little box behind the speedo?

                          Thanks for the suggestions

                          Comment


                            #14
                            Originally posted by maverick View Post

                            Ive illiminated the fuel pump,is the voltage reg the little box behind the speedo?

                            Thanks for the suggestions
                            Yes just remove one of two wires to stop it temporarily

                            Comment


                              #15
                              Originally posted by mallardstag View Post

                              Yes just remove one of two wires to stop it temporarily
                              Hi Thank you,can I do this with engine running to check for the interference?

                              Comment

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