I had a V8 with rough idle, inconsistent acceleration, emission inspection failure, and misfires on one bank. Dealership said it was the the fuel injectors, second option from an Indy was skepticism.
The Indy had an old school diagnostic tablet (all I can remember was it was bulky and blue) and after a LOT of digging he noticed an odd micro-voltage fluctuation in the offending bank's pre-cat O2 sensor. Ended up replacing it, I immediately noticed smooth acceleration and my emissions checks went green after 20 minutes on the parkway. Worth a look.
The issue is that acceleration on my vehicle is great and silky smooth, i only have issues when idling and low speed traffic driving (below 1000rpm) where i get the occasional misfire and CEL