Throttle body whisel

darrylglenda96 said:

Thanks. I found some information on another furum, besides the throttle body having sharp edges expecial by the iac. The opening for the EGR. Read where a guy filled his with cork. And solved it. I'll try all of those. Much appreciated

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Take a dremel and round the sharp edges of the iac holes. Worked for me.

I had a BBK 70mm and intake, smoothed the edges still whistled some. Put up with it for a couple years then went to an Accufab TB and power pipe, no more whistle. Good luck

If it only whistles when the IAC should be working at idle and at first at low rpm, it is the the IAC passages. (Some other brand whistle, but BBK has sold a lot of them. Top line F#.) Whistling under acceleration does not make sense for the normal issue.
Have you used a stethoscope (or hose to your ear) to verify the location?

I would NOT glue anything that might get sucked into the engine in the IAC passages.

My BBK 70mm used to be quiet but about a year ago started whistling. I tried smoothing out the IAC to no avail. Doesn’t really bother me anymore, sounds just like a pro charger so there’s that! Mine also lets out a big breath of air on shutoff