Really bad enging noise!! Help!

[shorti 10+ year member]

So i just got a HiFonics amp for my front speakers and some power horns. i hooked everything up and it sounded great, so it was time to mount it to my box next to my other amp. After I hooked it up I turned the car on and holy crap is there some BAD engine noise. i don't know where it came from because the only thing I changed in the setup is that it is mounted, so I unmounted it and still the same problem.

What would cause this?

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[shorti 10+ year member]

Also, my ground is great. The only time the RCA's touch the ground is for about a one inch stretch through a hole and the ground itself is screwed straight onto the body of the car.

 

[gunz4me 10+ year member]

How is the amplifier mounted? Is it mounted where the screws are going into the vehicle's sheet metal? Also, you wouldn't happen to have a Pioneer head unit, would you?

 

[shorti 10+ year member]

Yeah I have an Avic D3.

No, the amp is mounted to my sub box.

 

[dragnix 5,000+ posts]

most likely it's your headunit

 

[shorti 10+ year member]

Well that's doo doo.. that ***** was $500.

The whine gets louder as my RPMs go up. Like if I slowly start pushing the gas it sounds like I'm in an airplane taking off.

 

[curtisftracing 10+ year member]

What kind of deck is it? I had the same problem with my Hifonics after a cross over fell and created a ground loup and all I did was ground the rca's on the back of the Pioneer deck and now there is no humming sound period. Try all these steps and it will fix it.

http://www.caraudio.com/forum/showthread.php?t=198477

 

[gunz4me 10+ year member]

Yeah I have an Avic D3.No, the amp is mounted to my sub box.

You probably blew the Pico fuse on you HU which has to be one of the few things I HATE about Pioneer Head Units because it is so easy to blow.

 

[SethPhillips 5,000+ posts]

read my how to in my sig...

 

[curtisftracing 10+ year member]

You probably blew the Pico fuse on you HU which has to be one of the few things I HATE about Pioneer Head Units because it is so easy to blow.

Yep that is most likely what happened to my deck, I mean shit I like the deck it just is annoying that happened and caused me so much stress lol. I am almost positive it happened in this citation also even if it is a different brand deck.

 

[shorti 10+ year member]

Wow! I'm so happy. Just grounded the RCA's. It worked!

Thanks for the help!