pietrino

iTrader: (1)

OK,
I had a boost problem, and now i found this wire usured and looks blocked, i will replace it but is a vacuum line?
Anyone can tell me what is esactly thise hose and what connect, so i may realize where to find on the mazda manual.

Pietro

bajaman

That would be the ABV, or Air Bypass Valve. It works in conjunction with the CRV, or Charge Relief Valve.
The top or smaller hose is a vacuum hose that tells the valve when to be open or closed, it connects to the intake manifold.

pietrino

iTrader: (1)

So, it could be this that limit my boost?
Its look more as CRV looking the map of the boost line.
In my Rx7 work the 1°stage of boost, the boost pressure keep costant as the 2° stage turbo dosent start.
Thanks Bajaman, You where helpfull now I recognized on the map scheme.

Mahjik

iTrader: (1)

That won't limit your boost capabilities.

pietrino

iTrader: (1)

ok, but i suppose that some other like this will limit since all connections are a bit old, i will replace all vacuum and boost line.
Thanks

Mahjik

iTrader: (1)

What's the problem you are currently experiencing?

Sgtblue

iTrader: (16)

Isn't that the CRV? I thought the ABV was what 'we' call the blow-off valve.

pietrino

iTrader: (1)

My problem is that my boost pressure is costant at 0.45 BAR wich is the pressure of the lower turbine, i don't know why the high pressure 0.85 bar is not reached anymore in my FD.
Its look like some vacuum line is broken and some valve don't let the 2°stage turbine to work properly

Sgtblue

iTrader: (16)

------> http://www.autosportracetech.com/RX-...leshooting.htm

pietrino

iTrader: (1)

Thats beatyfull. Many thanks!!1

pietrino

iTrader: (1)

Ok sorry guys i really Need to be sure is the Air By Pass Valve the one on the picture,because it can make different.
Thanks
Pietro

Sgtblue

iTrader: (16)

From it's position in the picture, that looks to be the CRV. Check page F-88 in the FSM. The ABV, or Blow-off valve is up near the intake box.