i have a idle problems with my car. it goes from 750 to 1500 every other second when im at a stop. all sensors and everything is connected. i need help. sorry im new at all this.

 

Sounds like a vacuum leak. Spray carb cleaner around the intake manifold mating surface and throttle body mating sruface while the car is running. If while spraying the motor suddenly raises revs up, you've found your leak. If you can't find and gasket leaks, look at your vacuum hoses, one could be loose or cracked.