Part Throtle Ping

[LI-SVT]

My 2002 LS V8 sport pings with the gas pedal half to three quarts pressed and RPMs above 3500. More throttle and no ping. It is a little worse using the manual shift. Of course Lincoln service can not duplicate the issue I am using 93 octane fuel and am at sea level. Brand of gas does not matter. In the summer heat the problem gets worse.
I have read a few threads where others are complaining of similar problems. I don’t like it and am looking for a solution for making it go away

P.S. Don’t these cars have knock sensors? I have a scan tool, any ideas on which PIDs to monitor would be helpful.

Thanks

[shorod]

Are you confident it is a ping and not a misfire? Do you feel the engine bucking, or just hear a slight tapping? Does you scan tool have the I/M Readiness and does that show any misfire counts for any of the cylinders, even if no cylinders fail?

-Rod

[LI-SVT]

No misfire, it is knock/ping.

[CGGorman]

Mine has always done this. Well...until I got the Xcal, anyway.

Too much "vacuum" advance. Not sure what it's called now, but it's the part throttle advance that used to be vacuum advance back in the day.

[LI-SVT]

So with the XCal you removed some part throtle spark advance, but left the WOT setting alone?

Or did you remove a global amount of advance, like twisting the distributer?

I would hate to have to give up full throtle power in echange for less pinging. The car never pings at WOT.

[CGGorman]

I just pulled some light load/low rpm advance. My overall performance is improved and so is my driveability.