I know I know , How many times can one question be asked. ? Im new here so be gentle, I have installed several systems before without a ground loop problem ranging from a 85 Dodge Charger - 90 Mustang - 95 Dodge Dakota 4x4 and now my favorite ride - a 99 Honda Civic Si. It has some miles on it about 120000 but I still run it at the track, Reading the post before I think I might have narrowed it down . But Im not sure I need some dirrect help with my situation - since each car system is unique. I am getting a major alternator wine, specially at night with the lights and AC on. daaaaaaaaaa when engine is off - NO noise at all... when engine is on at idle no noise , da , but at high revs its there a bit with no load. with load it is really noticiable, In the engine bay I use Densol Iridium titanium plugs, with 8mm double insulated wires, I replaced the distrib cap and rotor. On the inside I have as follows - HU = Kenwood KDC-MPV619 mp3 / CD Changer controller, Im using the 4 Pre-outputs, to a Rockford Fosgate Punch 300x '4x35' this is running my Front Boston Acoustics RC5.5 and Rear is Sony Extreme 6x9's, From the 4x35 amp there is a Bass pre output @ 80hz lowpass , to a Rockford Fosgate 200X 200x1 bridged running 2 - 8ohm JL Audio W0 in a sealed box, the power is Stinger 4g from battery across the fire wall down the drivers side to a D-block = from there one to 4x35 and the other to a 1/2f Stinger CAP the to the subs. The Grounds are also Stinger 4g, The grounds go from the amps and CAP to a D-block and then to the base of my spare tire well ( inside the main body structure not on the out side of the side welds ) , The signal is Street Wire Zero RCA's from the head down the hump under the passenger seat on the left- throught the center of the back seat to my amp rack ( which is mounted at the same angle of my rear folding back supports. The Speaker lines follow the right side to the center of the fire wall , then to the wiring harness from the HU. ( hence the Civic has a Plug-in for the wiring throu the door jams , power mirrors,widow and speakers in the door, I dont have time to cut new holes, I am planning on gettng some kick panels ) OK so now what have I tried - larger grounds in engine bay - no effect, ran RCA from head to amp not under carpet but just straight line - no effect, hooked up my car to wifes car battery when she is running - no noise, had altenator checked passed with flying colors, battery is fine too, checked all ground and power lines for pinches or punchures, NOW what i haven't done - is probably it from reading the posts, I have tried a ton of stuff and the one thing i haven't tried is move the HU ground to the firewall or floor, I am a family man with a job a hour + away with a 4 year old and no time to spend on my ride, I think i made a mistake bye letting Circuit City do the install of my HU, - but it was so convinent to have them do it and all I needed to do is visit pet store for a hour with my daughter. This was last spring - so you can emagine how long i have put up with this, but weather is changing and I might have time to tinker - So I need some ideas to shot for and to plan out my attach with the right knowledge and tools I can get it fixed, any ideas ???
Thanks Bill.. wow this is a long one huh ???
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