[jwd3jdm]

I have a skunk 2 itm on my jdm h22 in my 92 4th gen and before hondata and tuning my itm made the same whistling noise. It's because when your motor doesnt have much torque (lower rpm's in 4th or 5th gear), the itm sucks in a shitload of air that the motor isn't sucking in fast enough and it makes a whistling noise. get it tuned and it'll stop. It's basically just telling you it could be puttin out like 5 more whp if you let it. haha. As for the idle. Its something to do with your tps (throttle position sensor) and you get idle bounce from this. Not a big problem at all, mine still does it too, it doesnt rob any hp. As for the check engine light, it's probly the lack of the egr valve. My skunk 2 itm did not come with a place for the egr, so you are forced to leave it off. Which is good bc the gay thing robs hp. Its the exhaust gas recirculator. It just puts some of the hot air from your exhaust into your intake manifold to make your car warm up faster (Not cool!!!) Hondata will solve this problem as well because you can bypass any check engine code you want. Thats what I did. If you dont plan on getting hondata or a tuning device, then you'll just have to live with the gay orange engine light glowing all the time. Good luck hope that helps.