AIr suspension problem xj8 2004

[jinkster]

I recently bought a xj8 2004 in the Middle East and It occasionally comes up with an air suspension problem. When it doesn't I can here a knocking when I go over bumps on the front. The car doesn't seem to sit low but the knocking is annoying.

Can you suggest anything I should check?

[jinkster]

Thanks all for the help. I bought Bag piping Andys kit from eBay and will fit that when I get back to the car in Qatar.

Regarding the suspensions. I've ordered two arms which include the ball joint - i've been told it could be this that is causing the problem. I shall keep you all posted.

Thanks.