Where is the idle air control valve on our cars? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

devtec · 07-03-2017, 05:05 AM

Seems like a silly question, since it should be on the throttle body somewhere. But having a hell of a time finding it... Car has the occasional idle dip, so just want to clean the IAC.

Haven't been able to find the IAC in any diagrams or in real life. There's obviously the plastic housing containing the servo motor and TPS riveted to the TB, but don't see where the IAC is.

TIA!

celek · 07-03-2017, 09:39 AM

throttle body is basically its own IACV it can open more itself to adjust idle via the ECU.
the only other sensors on the manifold if I recall are MAP and Temp sensor.
I have a similar Idle dip I just ignore it

Kodename47 · 07-03-2017, 12:51 PM

As above, it doesn't need an IACV due to the DBW nature of the throttle.

guybo · 07-03-2017, 01:35 PM

I wish it was as simple as turning a screw to adjust idle speed. I'd like to turn mine up too, but I can't tune and won't mess with that.

celek · 07-05-2017, 02:54 AM

Quote:

Originally Posted by guybo

I wish it was as simple as turning a screw to adjust idle speed. I'd like to turn mine up too, but I can't tune and won't mess with that.

There is a screw I have taken the throttle body apart,(I have pictures in my Ultimate NA build) BUT your ECU will probably burn out the motor trying to lower it.
Or adjust it in the tune

Ultramaroon · 07-05-2017, 02:58 AM

Quote:

Originally Posted by celek

There is a screw I have taken the throttle body apart,(I have pictures in my Ultimate NA build) BUT your ECU will probably burn out the motor trying to lower it.
Or adjust it in the tune

I think that's just a hard stop to keep from jamming the butterfly.

07-03-2017, 05:05 AM	#1
devtec Member Join Date: Feb 2010 Drives: 2015 Subaru BRZ Limited Location: Bay Area, CA Posts: 80 Thanks: 10 Thanked 32 Times in 11 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Where is the idle air control valve on our cars? Seems like a silly question, since it should be on the throttle body somewhere. But having a hell of a time finding it... Car has the occasional idle dip, so just want to clean the IAC. Haven't been able to find the IAC in any diagrams or in real life. There's obviously the plastic housing containing the servo motor and TPS riveted to the TB, but don't see where the IAC is. TIA!

07-03-2017, 12:51 PM	#3
Kodename47 Senior Member Join Date: Oct 2012 Drives: UK GT86 Location: UK Posts: 3,040 Thanks: 185 Thanked 1,629 Times in 1,112 Posts Mentioned: 155 Post(s) Tagged: 1 Thread(s)	As above, it doesn't need an IACV due to the DBW nature of the throttle. __________________ .: Stealth 86 :. Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook

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guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	I wish it was as simple as turning a screw to adjust idle speed. I'd like to turn mine up too, but I can't tune and won't mess with that.

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