Paculdo

been reading a few threads here re: pinging.. there are a bit of post asking - what does pinging sound like.. is it a beep/bleep, etc? recently i hear kind of a rattling noise when i'm accelerate hard using the paddle shifter (m-mode) - from the back it seems, then i checked the trunk if there's anything loose or something, etc, tightened the spare cover.. i think it happened a few times, i haven't driven it it M since.

i'm using the shell 93 octane.. is this normal? or something else i need to watch out for?

Merc63

Is your engine in your trunk???

bhamg

That's it!

Exacc

Pinging was described as: "Marbles in a can" by someone before, it seems very accurate to me. It occurs usually under heavy load (ie. heavy on the throttle).

Paculdo

so even on a 93 octane it will occassionally ping?

Paculdo

well.. for a moment there i thought i was driving a 911.. or an old beattle perhaps?

the question was how to know if its pinging. i posted the question as i dont know nothing about cars.. this forums helps newbie like me to know a bit.. i thought the rattling noise was from the trunk so i checked.. now reading about these pinging (and in certain circumstances e.g. accelarating) made me wonder if that rattling noise is the 'pinging' and not something from the trunk..

Merc63

Your cars not pinging. It has knock sensors that retard timing if it senses ping.