Amp ground or Rca ground issues?

[ace5high 10+ year member]

So I decided to up my ground wire to 2 ga tonight (to replace my 4ga),

Same good solid ground in trunk only now with 2 ga, Im now getting a pop when the head unit comes on and terrible engine noise which has been non existant since I installed my RF amp and my pioneer HU

I tried a few diferent ground points with no luck, finally to hook it back exactly the way I had it, STILL with terible Alt whine.

It seems to me it might be a Rca or my pioneer HU grounding issue, but why would it work with this same setup for 3 years then because I removed the amp ground only to replace it exactly the way I had it would it keep whining?

PLEASE HELP

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[ace5high 10+ year member]

I tried using a piece of wire to ground the outside of the RCA cables to the amp and it reduced the noise greatly.

What then is the best way of grounding Rca cables? should I get a better ground for my HU also?

 

[yacob.naif 10+ year member]

try searching, i think this is a common problem with pioneer head units

you could upgrade to some externally-groudned rca's, and ground them to the amp chassis