whistle from throttlebody?
 

i got this 65mm powerdyne throttlebody an fer sum reason it whistles kind of randomly sumtimes consistant uhm kinda think its from the idle air control not sure cuz been adjusting throttle set screw a lot since lost dam retaining nut!.. any ideas/input??

You can unplug the iac and get the car to run to see...I really don't know what to tell you...

My bbk 70mm does the same thing...only whistles around 1000 rpm when idling

drill a small hole in the middle of the tb blade it will solve the issue

that wouldnt effect idle? if i drilled a hole i assume id use a really small bit right? would it be in the center or twoards a side top bottom anywhere? has anyone else ever done that??