I have a gen 2 with 70000 miles with an aftermarket exhaust. But recently it has seemed to get less loud at high rpms, and also seems slightly more sluggish, ant thoughs?
It’s possible that a clogged catalytic converter is the issue. While it’s not a common problem for this platform, it does match the symptoms you’re experiencing.
Ok, would that be something you would replace, or will it cause any sort of long term problems running it like that?
My first thought is a bad catalytic converter. Mine went out around that mileage, and I’ve read about others on EcoBoost trucks having similar issues. It started throwing random codes when it was failing.
Do you know what those codes were, I had an underboost condition that would pop up randomly recently.
p0420 and p0430