Hey MBB41... if u do a search looking for my posts you'll see that 1/4 of them are about my pinging problems !!!
I have a Zetec.. and it seems I am the only one with the knocking...
The other week I found a cracked/cut vaccum hose... I am in the process of changing it...
I hope that is the cause of my problem....
What are u driving again ?? V6 or the Zetec ??