I just got a '93 Mazda 626 and I'm having some issues with the car audio. I use a car adapter for my portable CD/MP3 player which I hook up into the tape player. The problem though is that there's a huge bizarre background noise when I use my CD player through the tape player. And so, you can barely hear the music because there's that damn ZZZZZZZZZZZZZZZZZZZZZZ noise in the background. How in the hell can I fix that?