Rattling Noise When I Accelerate Hard

[baby34]

When i put my foot on the petal all the way.. just before it like- Flys Off- (The boost where it just goes ZOOM) i hear this rattle noise? When i accelerate normally/slowly i can barely hear it.. just happens when i put my foot down all the way..

Anyone know what this is? Or how much it costs?

I just spend $350 on my cat converter for a rattling noise in the exhuast and now i gotta get more fixxed =="

[trel]

maybe it's pinging?

[Ten Four]

NAs do tend to have a rattling sound under acceleration :\

[ssshonky]

my vote is pinging /detonation

take the plugs out and have a look at the colour of them - if they are really white that indicates your running lean