Whats Is This Part? And Whats Its Function ?

[heaveyfoot_ skyliner]

hi guys ,whats is this part circled in pink called ?

{ i think its ignition solenoid } and whats its function ?why mine is disconnected? is it because of turbo timer or boost gauge ? any help much appreciated

[blind_elk]

It's the AAC (Auxialliary Air Control) valve. It is for controlling idle. It really should be connected.

[PM-R33]

What he said^

[bubba]

+11ty.

[The Dan]

No the Auxiliary Air Control is located under the plenum. That is the IAC Idle Air Control Solenoid - It controls idle still but the auxiliary air control valve does something slightly different

[blind_elk]

Perhaps "a rose by another name". This is what I know as the AAC valve, and it's the thing that needs to cleaned when we say "clean the AAC".

The valve under the plenum I know as a "cold start air valve". Supplies additional air during warm-up. It closes off because a bi-metal strip cause the gate to shut, blocking off the air bypass.

[The Dan]

Perhaps "a rose by another name". This is what I know as the AAC valve, and it's the thing that needs to cleaned when we say "clean the AAC".

The valve under the plenum I know as a "cold start air valve". Supplies additional air during warm-up. It closes off because a bi-metal strip cause the gate to shut, blocking off the air bypass.

We could start calling turbochargers blow off valves if you like.

The part circled in pink is an IAC solenoid or IAC valve.

The part under the plenum is an AAC valve.

They do similar things but are not the same. A rose by another name is when there are two names for the same thing. These two items are clearly different and have different names.