So...I have the lumpy Idle problem and I attempted to remove, clean, and re attach it (following the simple instructions provided on a stickied write up). After cleaning the IACV and re-attaching the intake, the problem has ceased to go away. But moreover, I hear this very prominant "PSssSshhhhhhhhhh...hh..." (kind of like a turbo noise) spooling down and I think it is coming from the intake. Is this an air leak from the intake or is it supposed to make this noise and I have just never heard it before? Could it have anything to do with the coolant tubes connected to the IACV?

Much obliged in advance.

 

very typical sound for hondas or any car w/ an aftermarket intake

it's really the way that it should sound when the valve is clear, just did mine yesterday same result.

 

as long as your not overheating and re bled your coolant system after taking the IACV off then you should be good

 

Alright this problem has been solved. I wasn't aware I needed to bleed the coolant systen haha. Thanks for the input