Valve Clatter??

[dbrufus1234]

I have a 06 GT auto and when it shifts into 3rd gear under a load, like going up a hill, around 2800-3000rpm it sounds like valve clatter? It's been doing this for quite a while and I'm about ready to figured out what is going on. Anyone else had this problem? Also I don't believe it is pinging because it's a pretty faint noise. I'm going to clean the TB and MAF this weekend and see if that helps, BTW.
Running 87 octane brenspeed tune.

 

[Noobz347]

Remove the tune and report back. I would imagine that the heat and humidity are pretty high there in Alabama.

What you're likely hearing is detonation. Something else you can do if you're at half a tank or less is top off with with high test gas and see if the noise goes away.

 

[joe_momma]

^ This sounds more likely than valve noise.

 

[Steve491]

Fill up with at least 91 octane and see if that helps. If it does then you'll have to adjust your tune and/or run the higher octane. I have a BAMA tune ,their 87 tune needs 89, and their 89 needs 91, at least for my car in this area (Charlotte, NC).