lemmiewink

The more I read this, the more I am thinking that this is a joke. VVTi has nothing to do with the butterfly opening. It changes the profile of the intake cam at higher rpms for better performance.

Sounds like your friend is yanking your chain. He probably told you to check your canooder valve next to your flux capacitor so you can refill your headlight fluid and re adjust your exhaust bearings.

I'm still holding out for a real detailed picture of what you are talking about. Also FYI Ali is being uber sarcastic, if you haven't noticed.

Ali SC3

iTrader: (10)

What you have circled is toyotas ACIS valve (hope i got the letters right)

yes it opens at a certain rpm to change the effective length of the intake runners to make optimal torque at a given rpm range.
If it is not operating correctly check the vacuum valves going to the it.

this has nothing to do with VVti and most people who go turbo remove it. It not working should not affect normal operation of your engine. you may notice a slightly less top end torque.

StiCk3

iTrader: (5)

Almost right, that valve is the IACV (Intake air control valve) but what you have pointed out is part of the ACIS (acoustic control induction sytsem). The valve is supposed to open at 4500 rpm with at least 60% throttle from the TPS sensor. Try hitting the throttle harder and if that doesn't do it then check for proper vacuum at the valve.

Now we're getting somewhere...

SC_Edgar

Ah now I see.
Thanks alot, Now I know it's a IACV (Intake air control valve)!!!

But yeah for sure I don't feel it! I do notice the slightly less top end torque!

Ali SC3

iTrader: (10)

...??? IACV is the idle air control valve on the throttle body which regulates your idle when the throttle body is closed. what he pointed to is the vacuum actuated butterfly controlled by the ACIS system. I am not even sure it has a name but it is for sure not called the IACV.

StiCk3

iTrader: (5)

IAC = idle air control

IACV = intake air control valve

http://youronlinemechanic.com/2007/1...uction-system/

kinda confusing when manufacturers make items with similar acronyms.

Matador

So have we all agreed on the non-vvti yet?

Ali SC3

iTrader: (10)

Nice catch, I feel like after i looked it up in the repair manual.
IACV = intake air control valve after all.
IAC Valve = Idle air control valve.