Engine runs rough when trying to cruise

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! If your 2008 Nissan Sentra sounds like a go-kart when trying to cruise, especially in colder weather, it points to a potential air-fuel mixture issue or a problem with the fuel delivery system. Since you’ve already changed the spark plugs and cleaned the throttle body, let's consider a few other possibilities. First, check the mass airflow sensor (MAF) and the oxygen sensors. A malfunctioning MAF can misread the amount of air entering the engine, throwing off the fuel mixture. Also, if there's a vacuum leak in the intake system, it could lead to rough idling and acceleration issues. Given that cold weather seems to exacerbate the problem, it could also be related to how the engine management system adjusts for temperature changes. If you haven't already, running a diagnostic scan for any trouble codes could provide further clues. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.