[s-cars] S6 pinging woes - the continuation

[djdawson2 at aol.com]

 ... also, there is a shock wave (sound) created by opposing forces... piston traveling upwards while ignition is trying to force it down.


 


 

-----Original Message-----
From: Bares, Vittorio <Vittorio.Bares at nuance.com>
To: Taka Mizutani <t44tqtro at gmail.com>; s-car-list at audifans.com
Sent: Tue, Jul 28, 2009 11:28 am
Subject: Re: [s-cars] S6 pinging woes - the continuation










" I'd also check the fuel system to make sure that you're getting the
proper
amount of fuel actually delivered- if the pump or FPR or injectors are
not
doing their jobs, the computer might think it's sending enough fuel when
it's not."

FPR was replaced
Changed the RS2 injectors w/stock injectors (although used, behavior did
not change - so I assume they are either both good - or both exactly the
same bad, which is unlikely)
I have not done a spray pattern or volume test ...

Additionally, the plugs don't look lean at all - they look rich, very
rich.

I agree that a simple compression test should tell the tale...

So, can anyone post what physically makes the pinging sound?

Vittorio -


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