Whistling throttle body maybe...

[Jrock909]

Guys I am getting a throttle body whistle on my 65mm lightning throttle body and I am using a 96 Ford Explorer GT40 Upper and lower intake setup, what causes this whistle and is it common to have?

 

[kert0307]

I've got a whistle with mine too, started with the K&N intake set up, and definetly got noticable when I put a larger throttle body on(only does it when accelerating at 2-3k). Some people get it, others don't seem to notice it. If it's a whistle sound it's just the air flow, if it sounds like a fog horn check the IAC sensor.

 

[Jrock909]

Yah it's just a whistle, so I am not going to worry about it then...

 

[MONMIX]

I have the whistle too.
It comes from the TB
Every one thinks it is a super charger, till I get on it and the can see clearly it is not super charged