Need help with BOV

[rx7veilside]

u need a pce of silicon pipe one end over the valve other end on the i/cooler and tighten clips each end of silicon/next take a non shared vac line to get best vac feed
i can guarantee the bov is not faulty and that with correct seal and good vac veed u sill see the valve open..they are really simple the bailey ones so nothing to go wrong..either the seal is not good where it meets the i/cooler pipe or the vac feed pipe does not have sufficent vac to open the valve

[m1tch]

Ok I have tried a few things:

Recirc valve set up OEM, all plugged in ok = engine runs fine
Recirc valve set up OEM but intake end left open and bung in intake = engine won\'t idle and stalls
Recirc valve set up OEM but intake end left open and bung in intake plus a disconnected Vac line = engine runs fine

[m1tch]

Right ive just been out there again, on idle the BOV and recirc valve is fully open, I swapped the recirc for the BOV, plugged the intake but didn\'t connect the vac line, the engine runs fine, connect the vac line back up (it didn\'t matter if it was blocked or not, it still idles fine) the BOV opened fully and the engine stalled

[rx7veilside]

disconnect the vac line and run a new vac line from another dedicated vac source and connect the bov while u have plugged the other vac line..it must be realted to the vac line u are using

[m1tch]

The vac line I am using is the OEM vac line for the recirc valve though

[rx7veilside]

on a recirc there must be a pipe left open have u placed a bung in this pipe as it seems u are taking in or losing air which is why it stalls if

[m1tch]

it makes no difference if the vac line is blocked or just left open, i can hear it sucking quite a bit on idle hmmm

[rx7veilside]

not talking about blocking the vac line there must be a pipe that attatched to the re-circ have u blocked this off

[Prof]

The idea behind the recirc test is based on this thread:
 
http://www.mazdarotaryclub.com/forums/showthread.php?t=30312&highlight=recirc
 
M1tch has bunged up the intake and left either the BOV or Recirc valve on the output of the turbo compressor - and with no vac pipe attached to actuate the valve there is no problem.  This means that both the BOV and recirc valve are not leaking air normally, and the bung in the intake must be sound as well.
 
What it does mean is that there is too much pressure differential between the vac line and the turbo compressor outlet which is opening the valve on idle.  Not sure whether you can restrict or pill the vacuum line to stop that happening on idle - if it can be done that should be the solution.

[SmbFD3S]

Can you post a pic up of the standard recirc valve setup?

[Brett]

You might find some useful info here

[Prof]

:yes - I just looked there too !
 
Where did you take your vac feed from Brett ?
 
The only thing I can think, is that this BOV and the recirc valve open up with the vac on idle, is that supposed to happen ?

[SmbFD3S]

Thats exactly what happens on my FD....

[m1tch]

arg I dunno what I need to do why can\'t stuff just work lol *pokes BOV and tells it to stop opening on idle* lol

[m1tch]

Ive taken a video of my car dying lol this is the car running fine with the Baileys BOV on, intake plugged but the vac line off, then I put the vac line on and you can see the piston open and the car die

http://i93.photobucket.com/player.swf?file=http://vid93.photobucket.com/albums/l49/m1tch_2006/MOV00466.flv">