I have installed a DICE ipod kit and when I accelerate I get a high pitched whistle/wine. It increases in pitch as the revs get higher. I have tried removing the DICE from it's normal position but it hasn't made a difference. It sounds like my first stereo radio I installed 30 years before I put a suppressors on the spark plugs. Is the unit defector or do I need some kind of suppressor?

Thanks,

Gary