6G Celicas Forums

I have the same problem but I didn't always have it. i believe its just the tb breathing but also think the iac port plays a bigger part.
never had the problem until i cleaned out my tb and iac, and i had the ****tiest intake hose that leaked like crazy but it didn't whistle before. sometimes i run without the hose on tb and u couldn't convince me its anything else.i think it has to do with like the air splitting between the butterfly and iac port.
im not positive but i stand by the theory still. maybe this helps in some sort of way