2001 Caddy when put into start try's to take take off on me have to hold the breaks hard what is it

Hello, high engine speed is usually a result of improper air induction into the intake manifold, coupled with fuel provided on demand. Check for any unmetered air leaks that may be allowing too much air into the engine unexpectedly. Additionally, mechanical components that are linked to the throttle can cause this. Inspect closely, but definitely do not drive until resolved as this is a safety issue and can cause further vehicle concerns. www.repairpal.com/repair-shops