Why is my car shutting down at 2500 rpm

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. Best not to "change everything" - because what is being done and how are things being affected by "changing" parts? You can actually crate more issues than you may solve! Testing is the key. My gut feeling is that you may have an air intake leak or restriction causing the "shutting down" - kind of wondering what "shutting down" means -- stall? Lack of power? Maybe reach out to a shop near you for guidance. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.