Why does my car stoop accelerating on the highway

First just make sure you don't have a floor mat or somthing under your gas pedal. Ok, now let us know if you have a check engine light. If so you will need to start with a scan of the computer. You can get a quick generic scan at most auto parts stores for free but if you are not a DIYer I recommend getting a professional scan at a shop. Here is a link to find a good shop near you. https://repairpal.com/repair-shops Alex