why Does car seem to go into limp mode sometimes?

A good scanner and knowledgeable tech is needed here. The tech will check for trouble codes and actual values. This could be a throttle issue but only a complete hands-on inspection can determine the cause. Use this link to find a good shop near you. https://repairpal.com/repair-shops Alex

Hello, when odd things like this occur, all you can do is have test equipment actively connected checking various components when the problem is occurring. I would suspect a concern with the throttle body or related components that control throttle actuation, such as the accelerator pedal position sensor circuit. Once you can visually component operation on a diagnostic tool while driving, you will likely get clues as to what has occurred.