Notices
Series I Tech Garage The place to discuss anything technical about the RX-8 that doesn't fit into any of the categories below.

HELP! VFAD trouble

Old Jun 27, 2009 | 04:10 PM
  #26  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Originally Posted by Brettus
Oh damn....
Back to the video editing....
You were the first one to catch that!
Reply
Old Jun 27, 2009 | 05:05 PM
  #27  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Brettus- Thanks for catching my dumb-*** mistake.
I'm uploading the corrected video now.
Reply
Old Aug 31, 2009 | 12:20 AM
  #28  
@!!narotordo's Avatar
FLAME ON!
 
Joined: Jul 2009
Posts: 948
Likes: 0
From: Strip Club
thanks for the info
Reply
Old Aug 31, 2009 | 01:36 AM
  #29  
ASH8's Avatar
Super Moderator
 
Joined: Apr 2005
Posts: 10,880
Likes: 339
From: Australia
Jon316G,

Thanks for the info Mate!!!...
I don't want to unhook my VFAD.....just yet, .....BUT ......you have given me an idea....

I want your opinion on this...

You may not know this but Mazda in their wisdom????, No longer supply Vacuum nipples for each separate Rotor on the intake side ports, you know this is where dealers and Series I owners can Seafoam from...well what do 09 (Series II ) Owners Do???..

Is there any reason IYO why I could not use this Vacuum Nipple behind the Throttle Body?, the same one used for the VFAD..

I am thinking I could disconnect it and link in a temporary vacuum hose if I want to de-carb my Rotary???

What do you think Jon...will it work...where is RG when you want him...
Reply
Old Aug 31, 2009 | 01:43 AM
  #30  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Good thinking ASH... but there is one problem with that.
When you crank start the engine to decarb (ESS disconnected) the SSV and APV valves are closed.
As you know, the primary runners (which are always open) is at the "top" of the lower intake manifold.
So even if you pulled Seafoam into the intake from the VFAD nipple, wouldn't most of the fluid just run into the secondary and axillary runners?
And with the SSV and APV valves closed, nothing gets into the engine.

But you do raise a good question, what do the '09s do to decarb.
I'll have to think about this for a minute...

Last edited by Jon316G; Aug 31, 2009 at 01:46 AM.
Reply
Old Aug 31, 2009 | 01:49 AM
  #31  
ASH8's Avatar
Super Moderator
 
Joined: Apr 2005
Posts: 10,880
Likes: 339
From: Australia
I am thinking of cleaning without the ESS disconnected, even thinking of doing the "water" steam Cleaning method???...Thoughts..

I really like the idea and principal of steam cleaning carbon off, as the method should remove built up carbon in very fine particles...almost in reverse to the original build up??
Reply
Old Aug 31, 2009 | 01:54 AM
  #32  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
What about using the jet-air nozzle to spray the decarb into the engine?
HELP! VFAD trouble-jet-air-nozzle.jpg
Reply
Old Aug 31, 2009 | 01:59 AM
  #33  
ASH8's Avatar
Super Moderator
 
Joined: Apr 2005
Posts: 10,880
Likes: 339
From: Australia
Did not think of that Jon, what is it that attachés there "Jet Air" ??, I just want to check my parts info and see if 09's have it,...I guess they do?
Reply
Old Aug 31, 2009 | 02:01 AM
  #34  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Its one of the three hoses on the intake's flexible tube:
HELP! VFAD trouble-intake-air-hose-routing.jpg
Reply
Old Aug 31, 2009 | 02:06 AM
  #35  
ASH8's Avatar
Super Moderator
 
Joined: Apr 2005
Posts: 10,880
Likes: 339
From: Australia
Is that the Air Valve Actuator pipe for Emissions?
Reply
Old Aug 31, 2009 | 02:08 AM
  #36  
ASH8's Avatar
Super Moderator
 
Joined: Apr 2005
Posts: 10,880
Likes: 339
From: Australia
If it is the 09's use some of those Vacuum pipes but the AVA has changed and is 09 specific?
But it looks like it still connects in that area, parts info does not show that angle of diagram
Attached Thumbnails HELP! VFAD trouble-pipe%5B1%5D.jpg  

Last edited by ASH8; Aug 31, 2009 at 02:14 AM.
Reply
Old Aug 31, 2009 | 02:12 AM
  #37  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Originally Posted by ASH8
Is that the Air Valve Actuator pipe for Emissions?
No... you're thinking of the ACV.

Through the opening in the pic above (which usually has a hose attached), it comes out of the two nozzles on the other side of the manifold:
HELP! VFAD trouble-jet-air-nozzles.jpg

Last edited by Jon316G; Aug 31, 2009 at 02:18 AM.
Reply
Old Aug 31, 2009 | 02:19 AM
  #38  
ASH8's Avatar
Super Moderator
 
Joined: Apr 2005
Posts: 10,880
Likes: 339
From: Australia
Looks like that would do the job Ok Jon..?
Reply
Old Aug 31, 2009 | 02:21 AM
  #39  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
I think so.
And what is nice is that you get both rotors at the same time unlike doing it through the maintenance ports where you have to do it one side at a time.
Reply
Old Aug 31, 2009 | 02:31 AM
  #40  
ASH8's Avatar
Super Moderator
 
Joined: Apr 2005
Posts: 10,880
Likes: 339
From: Australia
If I use the water or Seafoam method would the car still run OK with that Vac line temp disconnected??, at about 2000 RPM
Reply
Old Aug 31, 2009 | 02:34 AM
  #41  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Well... when you decarb, you don't want the car to start.
Remember, you spray the decarb fluid while cranking for 10 seconds.
Then you let it sit for an hour before starting the car.
This is why you disconnect the ESS.

Refresher... starting on page 7 of this TSP:
http://www.finishlineperformance.com...5-08-1883f.pdf

Last edited by Jon316G; Aug 31, 2009 at 02:38 AM.
Reply
Old Aug 31, 2009 | 06:25 AM
  #42  
Huey52's Avatar
Registered Zoom Zoomer
iTrader: (2)
 
Joined: Apr 2006
Posts: 4,089
Likes: 6
From: New England
I capped mine near the removed VFAD actuator Jon just to keep out dirt in the unlikely case it's ever returned to stock. I didn't bother capping anywhere else and all is well.

Originally Posted by Jon316G
You don't NEED to because you already bled the vacuum out of the actuator.
But capping it (on the actuator side) isn't going to do anything useful since you won't generate vacuum with the hose uncapped.
Reply
Old Aug 31, 2009 | 06:32 AM
  #43  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Originally Posted by Huey52
I capped mine near the removed VFAD actuator Jon just to keep out dirt in the unlikely case it's ever returned to stock.
Makes sense if you wanted to play it safe.
Reply
Old Aug 31, 2009 | 06:40 AM
  #44  
Huey52's Avatar
Registered Zoom Zoomer
iTrader: (2)
 
Joined: Apr 2006
Posts: 4,089
Likes: 6
From: New England
Should I still cap the intake side for any reason? Again, I've not had a problem.

btw: although your video now more properly cites inches of mercury vacuum, air pressure is still the motive force. We're not talking Stargate Zero Point Modules here.
Reply
Old Aug 31, 2009 | 06:44 AM
  #45  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Originally Posted by Huey52
Should I still cap the intake side for any reason? Again, I've not had a problem.
So the nipple behind your TB is "exposed"?
Many users who installed aftermarkets intakes and forgot this step reported having issues since you introduced a vacuum leak into the intake.
Reply
Old Aug 31, 2009 | 06:46 AM
  #46  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Originally Posted by Huey52
btw: although your video now more properly cites inches of mercury vacuum, air pressure is still the motive force.
LOL.. I should have known better.
Just proves nobody is perfect
Reply
Old Aug 31, 2009 | 01:51 PM
  #47  
Huey52's Avatar
Registered Zoom Zoomer
iTrader: (2)
 
Joined: Apr 2006
Posts: 4,089
Likes: 6
From: New England
Oh, I would never leave nipples 'exposed.'

When I removed my VFAD I left all the vacuum piping in place and capped the end at the [former] VFAD actuator just to keep the line clean. This way I could simply remove the RB Duct, reinstall the VFAD and hook up the actuator line to get back to stock.

Note that I have my RB duct mated to my stock airbox.

Originally Posted by Jon316G
So the nipple behind your TB is "exposed"?
Many users who installed aftermarkets intakes and forgot this step reported having issues since you introduced a vacuum leak into the intake.
Reply
Old Sep 8, 2009 | 09:39 PM
  #48  
HWK11's Avatar
Lighting Yellow
iTrader: (2)
 
Joined: Sep 2008
Posts: 311
Likes: 0
From: west lafayette
so is that all? because i donno if the vfad is really open.
Attached Thumbnails HELP! VFAD trouble-vfad-cap2.jpg  
Reply
Old Sep 8, 2009 | 10:01 PM
  #49  
nycgps's Avatar
Out of NYC
iTrader: (1)
 
Joined: Jun 2005
Posts: 19,881
Likes: 36
From: Planet Earth
Just cap that nipple under the intake mainfold and you're done, Finish, DEAL !

no more questions.
Reply
Old Sep 8, 2009 | 11:26 PM
  #50  
@!!narotordo's Avatar
FLAME ON!
 
Joined: Jul 2009
Posts: 948
Likes: 0
From: Strip Club
Ok guys I got a cool video. Should I upload it to youtube then post it here? keep in mind I cant do this till I get home douh! lol
Reply

Thread Tools
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -5. The time now is 04:02 PM.