Sub Giving Feedback, Not sure what to check next. . . Options

[My94RedCelica]

Quick question for you all. I tried a search but didn't find what I need. I have a Kenwood in dash DVD player connected to a Kicker CVR 12" The set up and wiring was working completely fine, but after a week I started getting horrible feedback from the sub. My friend had installed the headunit, so I went back and traced the wires. He had the RCA, remote, and power wires running together. So I seaperated the RCA's from the remote wire and I still have feedback. I checked the amp ground. moved it around a little. Now I have a humming feedback, and it gets higer pitched when I hit the gas. i'm not quite sure what to check from here, so any advice would be appreciated!

[TRD6GC]

Cause you can't hear it doesn't mean your subs not getting the feedback.

When dealing with cars you should always get the better product, go big or go home. Even the best stuff doesn't work though, but your right it helps, sometimes tremendously.

I also say better safe than sorry, knowing they are run separately would just eliminate that "possibility" and then you can move on from there. If it stops then your good, if not then move on to the next possible problem. If SOME people have had a problem then it's always a possibility.

I have heard of a ground fault interuptor, though i have yet to work with one.