I have a multi channel AMP hooked up also. If anyone has any ideas at all please reply. It is very very very annoying.

BTW, I went there today again and they told me they looked through the wiring and they said it was all perfect but something seems not right. The istaller temp. added an equilizer and the engine noise went away but this isnt going to the source of the problem I assume. He wanted me to pay more money to put an equilizer in. I don't know who to trust. How do I know if they even checked? They refused to let me watch them work on my X. I already reported them to the BBB for using pressuring tactics as not doing the install correctly. They told me there had been other reports against them...so I was not the first.