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Old Jan 12, 2009 | 11:39 AM
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05civic's Avatar
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Angry Engine Noise

I have a 05 civic coupe. i have a sony headunit with 4 kicker speackers and 2 12in infinity subs with 2 amps and a cap... i get engine noise thru my rear speakers and i have already used 2 sound suppressors and it made it alil better but when it is cold out it gets really bad... any ideas on how to fix it?
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Old Jan 12, 2009 | 01:38 PM
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how are your amps installed, are they behind the seat on the box ect...

were are your grounds ....

and did you check to make sure none of your speaker wires are touching any metal ....

is it one speaker or both in the back and are you sure your front speakers dont have the noise....
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Old Jan 12, 2009 | 02:27 PM
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i had the same problem...but im not sure it can relate to your problem...i had a shitty amp and my ground wire was too long...
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Old Jan 12, 2009 | 04:59 PM
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Narrow it down. Switch your front RCA's on your 4 channel amp with the rear RCA's and see if the noise follows-then post results...
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Old Jan 12, 2009 | 10:33 PM
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Do what ^ mentioned and check your grounds.
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Old Jan 13, 2009 | 07:14 PM
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so if you get lice on your head you'd rather put on a beanie and a baseball hat rather than going to the root problem and actually fixing it?

Checking your grounds for a ground loop or grounded out RCA output/input is free and takes all of less than 30 minutes of good testing.
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Old Jan 26, 2009 | 04:36 PM
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agreed with the ground for the most part. Alot of amatures ground their amps to the cap and from the cap to a ground, so make sure u have seperate grounds for each of your amps and you cap, but going to the same place on the chasis. It could also be spark plug wires but you should have coil packs on an 05 if im not mistaken.
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