Put a tank of premium in it–no change (but I’ve only driven it 3 miles, so I’m not sure it would improve yet).
Checked the coils – at all about 300-400 ohms resistance, which should be acceptable (zero ohms is “no good”).
Injectors? Or could it be possible one of the plugs is weak (even though it is brand new)?
How does one test injectors without lighting oneself on fire?