Hi. I installed a cold air intake to my 3.8L Mustang. I started my car and it sounded great. However, once I put it into drive it started making a whistling sound. When I accelerate heavily it would stop. After the engine warmed up it isn't as bad, but still noticeable. I took everything apart and reassembled it making sure to tightly attach the clamps and make sure the rubber gaskets were secure. I still have the same problem though. Is this normal or is there anything I can do to fix it? Thanks.