2G 2g S90 IAC Adjustment

[EVTBernie]

I need some help finding my iac. My tuner said my numbers are high and theres a flat screw. I cant find it anyone know where it is? Tb/intake attached

 

[ThunderChild]

I believe your tuner is talking about a BISS, as the IAC isn't necessarily adjustable.

The IAC is under the TB connected to the FIAV housing, on the firewall-side of things. Basically right under what you pictured.

Your number are probably high because s90 TBs leak generally.

 

[Cherry]

My s90 leaked and it came right off. I could just touch where the throttle cable connects to the throttle body and it would whistle. My JM Fab came off too because either it wasnt seated right, or the gaskets they use just arent that great since instead of making contact across the whole surface like a regular gasket its probably around 1/16-1/8 of an inch at most making contact between the 2 surfaces. Put the stock throttle body and stock intake manifold back on no more whistles or weird noises.

 

[EVTBernie]

I was told it needs to be rephased. I know its sealed up after the build it was boost leak tested and hasnt seen any real boost. If i unplug my battery and reset ecu will i loose my tune?