Engine Whine/Hissing Noise

[kingsnake2009]

Hello,

Here are the symptoms of my problem. If i turn the ignition to ACC the unit starts as normal but i get alot of excess noise out of the tweeters. If i unplug the RCA connectors at the back of the hu, the noise disappears. If i was to turn the engine on, i get a loud alternator whine through all speakers and i can hear about every electric motor in the car over the speakers.

Here is what i have done to remedy the problem. First off I have a 90 Corvette that is mostly fiberglass, so i ran a 4 gauge ground wire straight from the amps to the battery. I ran a 14 GA solid wire from the hu to the battery, I grounded the shielding of the RCA's to the same wire as well as the deck chassis. I tried putting filter caps on the battery and acc connections- Made noise worse. Tried running a 14 ga ground and power wires straight from my amps to the hu- no change. I took 4 ga jumper cables and tried clamping them from the battery ground to the frame and engine block- no change Changed amplifier out- same noise. Tried a different Deck- noise gone. If you have any suggestions to hepl me track this down it would be much appreciated. I am running a Rockford Punch 600a4, Punch 1000a2, Rockford 10 Farad Hybrid cap, 2 10" Cerwin Vega V-MAX Subs, Pioneer TS-C720PRS's and TS-C520PRS's, Stock alternator, and an Optima Red Top.

Thanks

P.S. Just tried tearing the car apart and replanning RCA cable runs. Went down and bought Monster Cable RCA's and here's what i have now. If i set the cables outside the car and connect to the amp input I get some noise. If i disconnect i get very very little noise (acceptable amount). If i lay those cables through the car and connect to the hu... I start to get more noise even before the connector connects to the pre-amp out of my deck, like within an inch or two. Then i get alot of noise with the RCA connected. What am i missing here?! I took my brand new deck apart and fixed the blown fuse to no avail. Is there more to this Pioneer noise thing than just the RCA ground?

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[FOSGATE JOE 10+ year member]

WHAT HU,LET ME GUESS pioneer? Just ground the rca jack to the metal with wire or just do a search to show how its done

 

[FOSGATE JOE 10+ year member]

lol just saw you had that hu

 

[kingsnake2009]

Yeah, i tried grounding the RCA's and fixing the blown fuse. I grounded the RCA's to the Deck ground which is a 14ga solid wire straight to the batt

 

[FOSGATE JOE 10+ year member]

here you go bro.http://www.caraudio.com/forum/search.php?searchid=5901535&pp=30&page=2..I had the pigtails so just find a way to groung your rca jacks ...good luck homie

 

[FOSGATE JOE 10+ year member]

Yeah, i tried grounding the RCA's and fixing the blown fuse. I grounded the RCA's to the Deck ground which is a 14ga solid wire straight to the batt

okay sorry didn't want to read all that you said^^^