What would cause a vehicle to “stutter” is the best way I can describe it?

Hello, sounds like an engine performance problem, or an automatic transmission concern. It's impossible to guess what is going on, as so many possible causes exist. Concerns with: -Ignition spark -Fuel delivery -Engine compression -Engine timing -Air to the intake -Exhaust flow -Emissions control components -Automatic transmission internal slippage or issues -Manual transmission clutch issues Are all possible causes and contributors to the concern you are having. Hands on testing is needed. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops