hissing Q45a

[rover3l]

When I am truning right my Q45a is making a faint hissing sound. It is not the power steering as it only makes the noise when the car is moving. It seems to be coming from the rear and I am suspecting it is realted to the active suspension when it is trying to compensate for roll.

I have also got rattles from the rear end which I have eliminated the exhaust as being the culprit. However, this has been always present even before I changed the strut accumulators. It sounds as if something is loose but I can't see what when I go underneath as everything seems tight. Could it be the active struts themselves?

[texasoil]

Don't think the active would make a hising sound for more than 0.5 sec or less. Certainly not continuous.

Check for something shifting around--bad wheel bearings, differential noise?, something rubbing on tires? brake pads or rotors?

[rover3l]

The noise is only present for a very short time and only during turning right and continues for about 1 second after the car is straight again after completing the turn. It is a definate hiss like gas escaping. I am wondering whether it could be related to another issue you had mentioned in which was some trapped nitrogen. I will try bleeding this out to see if it eliminates this symptom