Hi everyone. I have a 2003 Chevy blazer LS with a v6 vortex. This has been very reliable untill today, when I saw it would not get much power after 60mph and a rattling sound is made (see videos). I originally thought it was my vaper canister solenoid as it has been broken for a while and I never got to fixing it. This was the only thing that came up when I did a diagnostic check and I asked if transmission problems would come up and they said if there were it would. I replaced it and drove it for a test drive right after but I have the same problem. Thoughts?

 

check for a plugged catalytic converter

 

It was my cat. I hollowed it out yesterday but I guess I missed some because I jsut straight piped and it runs mint