Brilliant09GT

Currently im not super worried about it because the car runs fine and I havent noticed anything wrong. At low RPM's (1200-1700 usually) when I give it any gas it makes a pretty quick knocking sound. I usually notice it when im going up a hill in 4th around 35-40 (within that RPM range) and I give it some gas. It goes up the hill fine, just makes the knocking sound. So my question is should I be worried?

Current mods are LT's, O/R X, CAI, and im running a Brenspeed 93 Oct Race tune.

moosestang

At those rpms, it could be your clutch making the racket. I'd down shift if I were you.

Brilliant09GT

Hmmmm didnt think about that. Ive started just down shifting like you said but I was just wondering if I should worry. Thanks!

kcmarti

Sounds to me like pinging, not knocking. Get a 91 Octane tune and use 93 Octane fuel and see if you still have the issue.

Brilliant09GT

I currently have an 87, 91, and 93 tune. Im using 94 Octane with the 93 tune. Brenspeed sent me a new 93 tune though since my current one was having some issues with one of the o2 sensors delaying the reading. So when I swap that out ill try tuning to the 91 and driving for a bit to see what it does.