Pinging From a Stop

[SonicB]

This just started about a week ago and has happened a few times. while at a stop light when i start to move on the green the engine will ping. my 1st assumption was bad gas so of course a tried fuel from another station with the same result.

anyone know what could cause pinging under this condition besides bad gas?

 

[Bullitt03]

Had the same thing and it was a partially clogged fuel filter hope this helps