Why is my car stalling, then accelerate rapidly when pushing the gas

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! Your Lexus is doing the automotive version of a mood swing—hesitating, then taking off like it just remembered it’s late for work. This could be a dirty throttle body, a failing mass airflow (MAF) sensor, or even a fuel delivery issue. Since it happens more when driven a lot, heat could be affecting a sensor or fuel pump. Start with the basics: check for stored trouble codes, clean the throttle body, and inspect the MAF sensor. If it still acts up, a mechanic might need to check fuel pressure and scan live data to see what’s throwing a tantrum. 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.