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Lighting & Mobile Electronics (I.C.E.)
Xenon lighting, HID kits, fog lights, BMW head units, navigation, speakers, subwoofers, In Car Electronics (I.C.E.), carputers, DDEs, angle eyes, halos, LED tail lights, interior lighting, etc.

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Old 04-01-2007, 02:48 PM   #1
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Join Date: Mar 2007
Location: Ma
Posts: 11
My Ride: 325xi
Engine Idle Problem w/stereo upgrade

Hello! , I have a '03 325xi. I just finished my stereo upgrade. i replaced my factory speakers with the JL xr525s and a 13w7 sub in the trunk. I powered the sub with a JL 1000/1 mono block amp and I used a 160w 2-chan amp to power my front speakers. I tuned down the wattage on the 2-chan amp to 40w per channel. I left the factory amp to run the rear deck. I had to use this configuration b/c I don't have a 4-chan amp yet. I'm planning to get it soon.

Anyways, I had the setup running for about a week and it seemed to be working fine until today. I noticed my engine was having idling problem when I started my car this afternoon. The engine response was very slow and stiff. It appears as if it was about to stall. In addition, I heard a whining sound coming from the right front area of my car as I accelarate. I initially thought might be a ground loop issue. In trying to troubleshoot the whining, I detached the right front door panel completely disconnecting the speakers. Surprisingly, the whining persists, but this time the sound seems to be coming from the the engine compartment.

Also, I suspected that idling problem was caused by one of the amps power connections, so disconnected the power from the 2-chan amp. This actually solve the idling problem, but the whining noise is still there.

I'm thinking it might be my alternator. I don't know if I might of caused some kind of power overload on the alternator? I guess it might be damaged or something?

Do I need a new alternator with a higher output than 120amps?
Or, is there something wrong with my setup?

I don't notice any power drainage, for example, light dimming or anything.

As of now, I'm just running my system without my front speakers b/c I left the 2-chan amp disconnected.

Can anyone confirm that, it is in fact, my alternator? or is it something else?

*Please don't ask how I got my 13w7 into my trunk.

-Thanks in Advance
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Old 04-01-2007, 02:52 PM   #2
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Join Date: Oct 2006
Location: New Hampshire/New York
Posts: 1,051
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bump in the trunk

lolz roflalzlasd
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