cap it

 

Take a pick of how you blocked everything off. I want to see what you did

 

You really just need to cap the nipple behind the throttle body.
This is the "beginning" of the vacuum line for the VFAD.


Autozone sells a pack of vacuum caps of various sizes.

 

There's a reason that a Mazdaspeed/aftermarket cold air intake is louder.

"All air all the time."

As shown elsewhere, cap the vacuum line that stock-controls the VFAD 'shutter' when removing it, otherwise the air pump will be overworked.

 

What air pump are you referring to?
Once you cap the nipple behind the throttle body (as I showed two post above), there are no other vacuum lines that need capped nor is there a pump anywhere in the VFAD system.

If the stock "air duct" was kept on the car, you can keep the VFAD valve open at all times by simply disconnecting the vacuum line from the VFAD actuator since it needs 10psi of vacuum to close it fully (which is why it has a vacuum chamber and a one-way valve inline).

 

aka Vacuum pump.

I was talking about the nipple behind the throttle body. For some reason I didn't see your post/picture Jon.

 

I won't get technically picky.... we're on the same page

Its OK... I'm sure others just skip over my posts too

 

The Mazda shop manual refers to it as an 'air pump.' I don't like that either, but I was trying to be technically picky.

You always have good posts and I really didn't see it. Strange 'net glitch today (Full Moon)?

 

Really?


Its all in good (and knowledgeable) fun Huey52.
Think you and I have "thumped our chest" enough yet?

 

O'rly? A vacuum chamber but an air pump. (I'm not really a last word must have guy, but this is fun)

 

so i capped it from the intake manifold jus like in the picture.. thanx jon.. but in the process of removing the hose i snapped off the lil buger i was suppose to cap off.. *&(^%*$%%, weLL i took a glue stick (its the thing that needs a hot glue gun to melt it) and sealed off the hole.. hopefully that holds in place.. about the green harness,somewere around the check valve, connected to the sensor, well can that be unplugged so i can remove the whole Vacum assembly?

 

That green harness is for the VFAD solenoid.
You can disconnect it and zip-tie it out of the way.
Then remove the solenoid and the rest of the hoses.

 

I'm going to Autozone to cap that sucker! what wires can I remove that are connected to the the Vfad? I has one that cliped to some hose. I'll see if I can take and post pix of it. I just want to clean up my engine bay

 

Everything that is inline between the nipple behind the throttle body and the VFAD valve can be removed (reference layout above in post #34).
Obviously, the solenoid harness will need to be zip-tied out of the way.

 

Whats the the solenoid harness? lol I'm a no0b

 

I've since concealed my harness inside wire loom and wrapped it with electrical tape, but I managed to find the only photo I took that had it showing.

Its the electrical connection to the VFAD solenoid valve.
You can see the VFAD vacuum chamber laying just below it on the under tray.
Later on I removed the whole under tray because it was ugly.

 

Oh I get it. Yeah thats how mine looks right now. Hey can I remove the parts that I followed in red in the attachment I posted?
Thanks!

 

Yup!

 

Sooo I went to do this last night, got everything apart only to find out that the owner before me had already removed it...atleast I know how to take the bumper off now lol

 

Took my VFAD off today and I can notice that is almost double or triple the loudness. I can also feel a little more in the butt dyno

 

yeah, its freakin sweet

 

Ok I don't get this...I took my car apart and there is no vfad to be found, but my car is not loud at all! Is there anyway that it is possibly intact somewhere and is not actually removed?

 

no
loud is relative i guess. go drive a car with vfad still on and you will see the difference, especially on full throttle under 5k-ish

hell, stock intake w/o vfad is louder than some aftermarket intakes (revi for one)

 

Took mine out the other day but ran out of time to take out all the wires up to the uim. I capped the hose where it rests behind the filter box; is that good enough?

 

You can technically cap it anywhere before the VFAD actuator.
As long as you don't introduce a vacuum leak into your intake, you're OK.
That means you can cap the solenoid, the vacuum chamber, the one-way valve, etc.
BUT... if you plan on removing the hoses running up to the VFAD (which would look a lot better) then you need to cap the nipple behind the throttle body and simply remove the rest.

Now it also won't hurt anything to keep some of the piping in place (like under the air box).
So if for some reason you only want to remove the assembly up to the solenoid (from the intake manifold) and not bother going any "deeper" into it, that is fine too.
You won't even need to cap anything because the VFAD valve needs vacuum to close and simply leaving the piping "uncapped" won't harm anything.
Again, the only thing that NEEDS capped is the nipple behind the throttle body.