I readed so many pinging stories here. I have a 98 taurus vulcan 74K, so many people said that the vulcan is notorious for pinging too. Can anybody give me some pinging sound record to listen?

 

The term is used to discribe a light knocking sound.
To give some background, the engine uses ignition advance to get the combustion started before piston top dead center so that maximun combustion pressures will occurr in the range of 12 to 20 degrees after top center for maximun push on the piston.
The knock comes about when the ignition is allowed to happen earlier before top center. This allows the peak combustion pressure to occurr before, at top or to near top dead center piston location.
At that point the piston/rod, crank mechanial relationships are all close to vertical alignment and cannot really move in response to combustion pressure so what you hear is head/piston/rod/crank and block ringing reaction to this event since the pressure is not being controlled in a smooth manner.
Enter one more item (in a normal engine) to this that affects this event. That is fuel octane.
You may now associate combustion speed with spark ignition timing. If you replace fuel that is known to cause an engine to knock, with higher octane fuel , this slows flame travel speed and re-establishes maximun combustion pressure back toward the area of piston location at the 12 to 20 degree travel location.
There is much more to this but I will end at this point for the purpose of your question.
You can see that with max. combustion pressure at the crank assembly vertical alignment point will cause the knock (ping) that you are referring to.
If you like to go deeper into this for some reason I can explain more.

 

Thanks for your reason of pinging. But i still don't know what does the pinging sounds like? For my taurus I just heard something like slightly cough when it's ideling after started up.

 

On the first line! A knocking sound.
You won't hear it on an idling engine, it's something else you hear.
Ping is a slang name given to spark knock.
A genuine ping sound dosn't sound anything like a knock.
Spark knock is closer to marbles in a tin can sound when shaken.

 

Got it, thanks.

Now i'm sure my taurus doesn't pinging. It's my first car, i just want to take care of it.

 

Good for you.

 

I have not found an exact version of how I think my truck sounds when it pings but I am posting some links to some sound files here and folks can tell me Im not even close or if one sound file is closer than the others ...

http://www.sounddogs.com/previews/17...UNDDOGS_To.wma

These glass windchimes kind of remind me of the sound my F150 5.4L engine makes. The pinging only occurs for a second or two at various places in the sound clip ...

http://www.sounddogs.com/previews/21...UNDDOGS_WI.wma

 

Thanks