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Old 01-23-2004, 02:32 PM   #2
elsanto
Scooby Specialist
 
Member#: 34832
Join Date: Apr 2003
Chapter/Region: Tri-State
Location: was once a nut like me.
Vehicle:
1989 M3
White

Default

did you upgrade the ground to the battery, chasis, intake etc? I had terrible noise in my car also but ran 4ga from batter to HU/amps for both ground and power solver the problem.. also if you have external amps make sure they are grounded to the same point as the HU. Its really strange that there is noise there when your car is off however.. you might want to put a meter on the battery and see what its doing.. could be the battery. or a loose/pinched speaker wire somehwere.
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