Ok so i got all my engine lights fixed. Forgot to clear the DTC before making this run. My car was sluggish and sounded muffled a while back. Since then i changed the opti, cleared the codes and the car ran great and sounded amazing for about an hour. Now my original problem(muffled exhaust, sounds like its not firing on all cylinders) is back again but no engine codes. I enclosed a reading i got while accelerating. Pretty small file.

 

That is a data log of two seconds of the engine idling (TPS = 0%). The vehicle is not moving or accelerating (MPH = 0). Absolutely useless.

You need to open the files and learn to read the basic info. You also need to run a data log following the procedure I spent time writing and posting. I gave you the link in your original thread, and when it appeared you never read it or followed it, I stopped helping you. Let's not go down that path again.

https://www.camaroz28.com/forums/com...-guide-886891/

And in the past couple months I've declined to help people with interpreting data logs because they didn't follow procedures, didn't follow my suggestions of what needed to be repaired, or just stopped responding.