(Solved) Excessive exhuast popping on decel all of a sudden.

[EthanolTurbo]

I have access to a dyno so it cost me nothing 🤷.
Car was running fine for over a year and a half. Odds are the o2 was on it way out and somehow it caused a hiccup with the tune once it threw the rich code originally.

I just want to confirm it’s actually not running rich or lean when I flash back

Use a wideband o2 sensor and wire it into the section 1. Cheapest and mostly accurate. I would still do a new tune.

[Riley]

Use a wideband o2 sensor and wire it into the section 1. Cheapest and mostly accurate. I would still do a new tune.

That's the whole point of putting it on the dyno to use a wideband to check afr and adjust the tune