So I was driving down the freeway tonight and went over what seemed like a newly paved road. I figured now would be a great time to see how silent my car is with the TRD CAI. Rolled up my windows and turned off my music.
Everything was fine, pretty silent for such a light nimble "Race Car" but then a strange thing happened as I hit 3500 RPMs on the Sixth Gear. I started to hear this high pitched tone that seemed to come from the Engine. I couldn't really identify what it was and I've never heard anything like it before.
I did some testing while driving and found that as soon as I dropped below 3500 RPM the high pitched tone would go away. The instant I accelerated and went back up to 3500 it would come back. I was literally able to turn it on and off by removing my foot off the gas. I guarantee you I wouldn't have been able to hear it without the sound tube delete and freshly paved road.
Is this normal or should I be making a stop at a Toyota Dealership before my warranty ends?
