oh yeah i can make it whistle pretty good, loud enough to hear it over my exhaust with the top down or window open, partial throttle it gets a whistling sound, or just reving it quick gets a nice suction sound. something i have noticed though lately after the car warms up if i come to a stop the car revs down then slowly revs back up a little to about 1500 then quickly falls right to normal after a few seconds of being revved up, does it every time i stop pretty much after the car warms up only though i believe. whats going on with this rob? ive tried unhooking the terminal and resetting the computer, everything is hooked up right and connected, no leaks anywhere.