fast pinging

[twolo4u2c2]

Here is a question for all you guys. I have the timing set at 12*. As I roll on the throttle to wide open the motor pull hard and no pinging. (i use highest octain I can get). BUT.....If I'm going about 30MPH and holding the gas At 3000 and slam the gas down I get a really fast pinging that quickly stops when accelerating Its like the computer cant react fast enough to retard the timing. Any ideas? Ive even backed the timing down to 10* and it still does it the same. Lets see if anybody hase any answers.

thanks in advance.

 

[HISSIN50]

what are your revs at when you mash the gas? if low (esp if in a higher gear), it might just be lugging, which will ping.

 

[twolo4u2c2]

thanks for the reply...I dosent matter what gear....it does it not matter 1st, 2nd, high rpm low rpm....does it the same. I'm baffled

 

[HISSIN50]

do you have EGR?