Speaker Feedback

[Willicuddy]

So I have some speaker feedback and a popping noise from the speakers when i start up.

Did some messing around and found out that the feedback and popping noise only happen when the ebrake is not up. So when I pull up the ebrake, even a little bit (as long as the ebrake comes on), the feedback and popping noise cease to exist.

Anyone experienced this before?

The car is a 95 GT and has a Mach 460 with an aftermarket head unit

 

[cbarr300]

Check the connections in the back of your headunit. Sometimes a loose connection can cause popping and feedback. I don't know how the e-brake would affect the radio

 

[Willicuddy]

Check the connections in the back of your headunit. Sometimes a loose connection can cause popping and feedback. I don't know how the e-brake would affect the radio

Yeah i know, thats why im at a loss.

I mean if there was a lose connection, why would it be "fixed" when the ebrake is pulled??

 

[Stanger007]

I had a popping in my stereo (Mach 460) with the FMS plug wires. When I switched to Taylors the noise went away.

wes

 

[The Green GT]

Does anyone elese have a compacitor on their coil? Mine has one and Im assumed it was to stop feedback.

 

[HISSIN50]

There's a little silver cylinder on the back of the coil bracket - it's a noise suppressor. Eric, do you have more than that?

 

[94GTMOOSE]

did you try reving the car up while its making the noise. Does it get louder the higher the rpm. i changed my plug wires to taylors, and all the interferance went away in my car. Although the ebrake thing is throwing me a curve ball.

 

[Stanger007]

I have the noise suppressor as well - changing the wires was my fix.

Wes

 

[Adam95GT]

sounds like its got a bad ground or you need new wires

 

[HISSIN50]

I recall some folks saying there's a ground wire in the driver kick panel that can be problematic with regard to noise with Mach systems. Just tossing it out there for people to say yes or no to............

Good luck.

 

[94CobraPace]

My 94 does this sometimes. I had it fixed for a couple years by tighnting the ground behind the drivers side kick panel & checking the plugs in there. I need to do mine again.
I can tap on the kick panel & it gets worse or betters?

 

[94CobraPace]

Double post.

 

[Willicuddy]

My 94 does this sometimes. I had it fixed for a couple years by tighnting the ground behind the drivers side kick panel & checking the plugs in there. I need to do mine again.
I can tap on the kick panel & it gets worse or betters?

I will give that a shot and see what happens.

Also, I have just changed the coil/plug wires/dist cap and rotor and it didn't make it worse or better.

 

[The Green GT]

There's a little silver cylinder on the back of the coil bracket - it's a noise suppressor. Eric, do you have more than that?

Its called a compacitor. When I went to get a new coil, I wasnt sure what it was. Whne I figured out what it was, I was going to replace it too, but they said our cars didnt have them.

 

[HISSIN50]

Its called a compacitor. When I went to get a new coil, I wasnt sure what it was. Whne I figured out what it was, I was going to replace it too, but they said our cars didnt have them.

You are correct. The official name as I recall is the 'Radio interferance capacitor.'

 

[a-spec FD]

It's not feedback, that’s when a speaker can hear it's self through another speaker that has a 180 degrees phase difference (a microphone). What you have is a ground problem or a loose connection in your speaker (+/-). Not a good thing either way. Just check your connections between your head unit/speakers. I'm a sound engineer trust me.

 

[Dagz]

+1 ground wire, that is where I would start.

Dagz

 

[SeventyMach1]

I hope I'm not taking from the thread .... but I have a question on this topic ...


I've started getting noise through the speakers recently. I can hear my car through the speakers when driving (only when head unit is on). At first I thought it was pretty cool, lol. Sounds high pitched, and when taking off, sounds like an Indy car leaving the pits, lol.


Will replacing the capacitor fix my problem? Does anyone know how to "test" it to make sure it is working properly? And if so, where can I get a new one?

 

[20new5.0]

I hope I'm not taking from the thread .... but I have a question on this topic ...


I've started getting noise through the speakers recently. I can hear my car through the speakers when driving (only when head unit is on). At first I thought it was pretty cool, lol. Sounds high pitched, and when taking off, sounds like an Indy car leaving the pits, lol.


Will replacing the capacitor fix my problem? Does anyone know how to "test" it to make sure it is working properly? And if so, where can I get a new one?

I'm having the same issue, I have already changed the compacitor ontop of the coil and the problem still exist. I have checked all my grounds (AMP, Head Unit, Batery) I have also tried grounding the battery to the chassis and the noise still continue's.

I plan on picking up a noise suppressor after work today (one that goes on the power lead of the head unit) to see if that helps.