Holden commodore knock & timing issue

[fizzo]

hi guys.

New bloke here looking for some answers.

i have data logged a mates car. Holden Commodore VT Series 1. with a 4l60e trans and 3.8L v6.. car seems to run fine until as such time mainly up hills when it starts to "ping" does the same on gas & Petrol

I can send definition file and data logged files if someone can help.

cheers