ColinGT

It sounds like something could be loose? but it only makes a clinking and clanking noise when i get on the throttle. And it seems like it gets louder in the higher gears. It dosent do it when i downshift and the rpms are high, only when im on the acclerator. I did run my car hard yesterday but....

forpointsick

its probably your timing chains they are prone to failure.can you get a video of it and put it on you tube or something and link it to this page

Donnie's GTS

since it under load, could be pre-detonation, through some premium fuel in there. Is it an intermittent clank or does it sound like marble rattling around?

ColinGT

it almost sounds like a marble, and like a tin can hitting it with something metal....

flyifrvfr

My 08 did the same thing. I haven't figured out yet what is causing it.

CubanoGT

mine does the same i put some octane boost! and it stoped..

ColinGT

I put in fuel injectoin cleaner, fixed my 02 sensor, put in premium and its coming from my exhuast, we think its something in my cat. idk how.