if you remove the stock intake you will end up removing the vacume tube that activates the vdaf. and i think from removing to intall the revi you have an extra elec connector hanging down.

i got a cel. from something else, but the vdaf was noted in the cel.


hope this helps

beers

 

What does this vacume tube look like?
I think the only thing actually connected into the intake was the 02 sensor on top, the rest of the wires/tubes were just latched onto the stock intake but did not go inside it.

 

exactly... i just kinda stuffed them under the intake housing... these can be removed without consequenses?

 

man,
you are making me think. just went to the cool *** garage and if you removed the stock intake you had to undo the wire connector and the hose that make the vadf work.

hope this helps i can photo if needed.

beers

 

Does the wire connector your talking about have a metal part that attaches it to the intake box? If so, that metal part comes off along with the connector just by unscrewing two screws that are under the metal, only visible if you flip the stock intake box over.

If your would mind, a photo would help out a lot. Thanks.

 

im gonna go snap a pic right quick and show you what im talking about.... brb

 

this bundle here...

ps... this attaches to the back of the stock airbox... is this needed/causing a problem?

 

If you want to try disabling the VFAD, follow the vacuum line for the actuator back to where it connects to the intake manifold. Remove the line and cap it off so there is no leak, and unplug the green connector.

 

That vacuum hose line is a b*tch to get off. At least mine was, I have big hands, no room to work, and the thing was stuck on good. Make sure you have a cap for it like whitehot showed you. Otherwise you'll bust a CEL. Sorry, should have explained VFAD when I asked.

 

???

 

bump

im sure that someone on here has thrown a CEL after installing their intake... can someone PLEASE enlighten me as to how to cure this problem? i know the CEL has to have something to do with the change in airflow or maybe a misfire....

 

nevermind guys.... i called my dealer service dept. and they are so cool. i told jake what the problem is and asked if i reset the ecu if it would erase my updated flash. he said no, that it shouldn't. now... given some of you have poor dealers, this is why im posting this. he knows that i have am aftermarket intake (which caused the CEL) and told me that if resetting it didn't fix it, to swing by and they would reset it FOR FREE UNDER WARRANTY!!!! that is awesome. if anyone is in this area, SE Missouri, i would STRONGLY recommend for you to go to Bening Mazda in Cape Girardeau. this is the best dealer that i have ever dealt with....

gotta go... new ms exhaust is here!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

Why would the dealer resetting the ecu be any different than you resetting it yourself?

Do you still have the sputtering problems at high speeds?

 

I'm not sure if anyone mentioned a "flash reset", but you resetting the ECU has nothing to do with the flash. What you're doing with an ECU reset is clearing the NVRAM and the KAM. This DOES NOT reset the PCM, meaning it does not clear out a PCM flash. Here are the procedures for clearing the NVRAM and the KAM:

As for the other issue...

Removing the VFAD won't throw a CEL as long as you make sure to stop up the vacuum feed with the red plug in the picture (by whitehot) above. The VFAD has a sensor at the end of the vacuum tube. If there's a change in pressure, it throws a CEL. Since you're effectively stopping the VFAD up, you will never have a change in pressure and no CEL from the VFAD.

The electronic connection to the VFAD operates it, meaning controlling the opening and closing of the unit. From what I've read on the forum, sometimes a change in the intake (and the resulting change in "normal" or "expected" airflow) will throw a CEL. This doesn't happen to everyone, it didn't happen to me. But clearing the NVRAM and the KAM will help to prevent a CEL, or will clear the CEL once it's popped.

If the CEL keeps coming back..., then I'd contact the dealer. I don't think this is a case of anyone having "poor dealers", but the ECU reset procedures are available on the forum... it's even a sticky. https://www.rx8club.com/showthread.p...ight=reset+ecu

I hope this helps clear up some confusion. Happy modding with your new parts. Best thing I ever did (after buying my 8) was slap in the intake and exhaust!

 

Just to get this right, you plug up the part indicated on whitehots pic, and you leave the tube that was originally connected there unplugged since there is no airflow in there anymore?

Also, what do i plug up the hole with?

For some reason this intake doesn't seem to be cooperating with my car (although some other people have this intake on there car as well with no problems). I get some odd idles at times (bogs down slightly then pops back up) and at high speeds (around 65+mph) I can feel some odd sputtering around 4400-6000 rpm. I think the intake may not be getting enough air, but I dont know for sure. It may be the VFAD at those speeds, but that still doesnt explain the sometimes-rough idle. But it sounds dam good...

 

It's still on in my car and may be causing the problem i'm encountering.... I went outside and took a quick picture.. So what do i remove? The entire circle thing and that silver thing.

The blue hose is heading towards the throttle body? So i just plug the hole up?

And what about the black hose running to under the remaining air box

 

Oops forgot to attach picture..

 

Hey why are your tubes blue. Mine are black hah.

 

well coz i had some spare HKS colourful hose remaining.. coz i swapped what i could.. haha

 

? #1- i tried resetting the ecu and the cel is still on, so i'm gonna have my dealer reset it.

? #2- no... no more sputtering, but i was having the same issues that you were at the same rpm. it just went away after bout 30 min, if that.

 

i got K&N ver 2 and have no CEL... i ddint take any hoses off either.. car runs fine like stock...i still dont get this VFAD crap...i did not take my bumper off nor did i permanently disconnect any hose..

so is my VFAD still "on"??

 

Some people get the CEL, others don't. I'm chalking it up to another weird quirk of our cars...

Yes, your VFAD is still on. The VFAD removal is optional, but I don't think Racing Beat would recommend taking it off for the heck of it. Logically, the VFAD looks like it would get in the way of the normal airflow path, and that could be what is causing the low rpm rotary shudder. If you get a ram air duct, you definitely have to take out the VFAD.

There is a black hose that comes from the underside of the throttle body, it runs around the stock intake and disappears into the bumper through the intake hole. To remove the VFAD, you'd have to:

- Remove the bumper, directions are on the forum.
- Remove the VFAD unit.
- Cut the vacuum hose (I couldn't fit mine through the hole in the bumper due to a piece of "hard line" that connects two hoses)
- Remove the vacuum hose from the plug and replace with the red cap indicated in that pic above.


---

sstricker, did your new exhaust get in? which one did you get?

 

yeah, the exhaust is here and on my car! i got the new MS Sport Exhaust! this car sounds pretty damn mean with the exhaust and simota intake! pretty kick ***!

 

yes!

beers

 

i almost forgot... if you read back a couple pages, umnitza was wanting someone to "test" their CF engine cover.... they sent me an email asking if i was interested. so i asked them how much? $249?!!!!!! i said, thanks but no thanks.....