hey guys, just as the topic said.. i was driving in 2nd gear today on the way home and kinda punched the gas (because my check engine light went off, i knew my car was running good today!) and i hadn't gotten to put that pedal down in a while so yeah, i did it. and when i did, there was a pretty noticeable whistle type noise (sorta like when you whistle through your teeth with your tounge and you can hear the air and the whistle)..... so is that a vacuum leak? because it was pretty loud. as i kept driving, it didn't happen anymore but it did a few times. let me know guys!