Hello, I’m just investigating the valve on my car. I know the pipe was removed some years ago, and I also know that at some point there was an alias intake, however the intake is now what looks to be OEM(I haven’t looked at the internals though).
with the red pipe(which goes down to the exhaust valve) disconnected, the exhaust valve is open/exhaust is loud. With the red pipe attached the exhaust is quiet. Therefore the vacuum valve on the exhaust is moving okay.
with the red pipe attached to the T piece, between the air box and the solenoid, the valve does not operate by pressing the left hand steering column button(the red display shows the open or closed status when the button is pressed). I have also noticed that if I rev the engine above 4500rpm the exhaust still doesn’t open automatically. Does this mean there is maybe something missing from inside the air box…..? Or maybe the electrical operated solenoid is not working?