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AU1 Engine/Speaker Interferance 

 

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 Post subject: AU1 Engine/Speaker Interferance
Posted: Mon Apr 19, 2010 11:35 am 
Tyre Shredder
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Age: 29

Posts: 365

Joined: 22nd Nov 2007

Ride: FG MK2 XR6T

Location: Bexley, Sydney
NSW, Australia

I have just noticed a issue with the front left speaker. It will happen regardless of whether the radio is on or off. It basically whistles or makes a hi-pitch whine noise at idle. It gets higher pitched if I rev from idle up to about 2000rpm after which point it goes away but will then return when the engine returns to idle.

It will not to do all the time but is rather a intermittant problem.

Completely stock & untouched AU1 premium sound (with the stacker in the boot, not in-dash).

Any help would be much appreciated.

 

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 Post subject: Re: AU1 Engine/Speaker Interferance
Posted: Thu Apr 22, 2010 12:49 pm 
Tyre Shredder
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Age: 29

Posts: 365

Joined: 22nd Nov 2007

Ride: FG MK2 XR6T

Location: Bexley, Sydney
NSW, Australia

5 Views in 3 days??? :?:

Anyone?

 

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Formerly LV XR5 Turbo, AU Fairmont Ghia V8 & EBII Fairmont I6.

Now......
Feb 2012 FG MK2 XR6 Turbo
- Manual
- Luxury Pack

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 Post subject: Re: AU1 Engine/Speaker Interferance
Posted: Fri Dec 17, 2010 11:00 am 
Oompa Loompa
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Age: 26

Posts: 28

Joined: 28th Sep 2010

Gallery: 1 images

Ride: 1995 EF Falcon Futura Classic

Location: Bundoora, Melbourne
VIC, Australia

I have the exact same problem.

 

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95 EFII Falcon Futura Classic; 2.5" Cat-back exhaust, Hi-Flow Cat, Redback Extractors, Lowered with Monroe GT Shocks, Boxed Pod Filter, BA Snorkel, Smoked Tail Lights, DBA Slotted Rotors, Pioneer/Orion Sound System and 19" FPV Cobra Wheels.

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 Post subject: Re: AU1 Engine/Speaker Interferance
Posted: Fri Dec 17, 2010 11:35 am 
Technical Contributor
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Age: 28

Posts: 3705

Joined: 27th Sep 2006

Gallery: 20 images

Ride: ED Falcon

Power: 133 rwkw

Location: Leeton
NSW, Australia

I'd say something in the car is inducing in the speaker wires...

The speaker wires from from the head unit across to the left hand door... Is the computer still in passenger kick panel in AU1's? It could be the tacho wire... Hence the quicker the rev the higher the pitch... It wouldn't stop at 2000rpm... Its just so high you can't hear it...

Not much you can to fix as is... This is the issue taping speaker wires in looms with other wires... Called electrical noise or induction...

Way around it is to run your own figure 8 speaker cable to the door but keeping it separate from other looms... Once its in the door it should be fine... No wires in there that would cause issues... And if this still doesn't fix it... Run figure 8 with shielding and bond the shield to earth... This stops the noise penetrating the signal wire...

Cheers,
Tim

 

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Visuals: FG XR Wheel, XR Front, 17's, BA 5 Spd Shifter, BA Ghia Window Switches, NL Cluster
Tunes: 8" Pioneer Sub, JBL Speakers, Clarion Double DIN Headunit

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 Post subject: Re: AU1 Engine/Speaker Interferance
Posted: Fri Dec 24, 2010 1:12 pm 
Oompa Loompa
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User avatar

Age: 26

Posts: 28

Joined: 28th Sep 2010

Gallery: 1 images

Ride: 1995 EF Falcon Futura Classic

Location: Bundoora, Melbourne
VIC, Australia

So I fixed this problem, I didn't really read any comments/solutions above so somebody might have said this already. We tried a bunch of things (securing ground, fiddling with cables etc.), none of them worked. So we took off the door trim and did the wire connections again, fixed it. Works perfectly now.
It's probably not the same problem for you, but it's worth a shot.

 

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95 EFII Falcon Futura Classic; 2.5" Cat-back exhaust, Hi-Flow Cat, Redback Extractors, Lowered with Monroe GT Shocks, Boxed Pod Filter, BA Snorkel, Smoked Tail Lights, DBA Slotted Rotors, Pioneer/Orion Sound System and 19" FPV Cobra Wheels.

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