Hello All!

Long time Lexus owner but new to the forums. I currently own a 2020 450h Luxury, 2025 450h+ and a new to me 2006 330.

I was gifted the 330 from a family member that passed away earlier this year. It is has been maintained by the local dealership for it's entire life and currently is sitting at 210k miles. When I received it, it had a P0430 in Techstream. Acceleration was sluggish but thought replacing this would solve the problem but sadly it didn't. The issue that I am having is when accelerating under full load (pedal all the way down) it starts off fine but feels like the power cuts out around 60mph and then comes back kind of like a car that isn't getting enough fuel.

Here is everything that I have done so far
Replaced Catalytic Converter
Replaced two O2 sensors
Transmission 3 time drain and fill (transmission shifts smoothly but wanted to replace since I wasn't sure if it had ever been done)
Fuel Injectors
Spark Plugs
Coil Packs
PCV Valve
Several rounds of Techtron
Differential Fluid
Both front axles

Also, this car has only had 93 octane fuel used during its entire life. I have tried other brands to see if maybe that was the issue but no change.

I am totally at a loss. I am not sure what else it could possibly be at this point. I do still get the "sulfur smell" every now and then but not nearly as much since fixing the P0430 code. My last thought would be the fuel pump and filter but didn't want to start replacing that until I was sure that I ruled everything else out.

Any thoughts?