speaker crackle

[maverick]

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

[Niallcat]

HT leads ?

[maverick]

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

[macstag1]

Hi Maverick

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

[maverick]

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?

[macstag1]

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

[Phil S]

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

[maverick]

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

[maverick]

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 ?

[Lingen]

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.

[maverick]

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

[mallardstag]

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

[maverick]

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

[mallardstag]

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

[maverick]

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?