can somebody tell me wats wrong with my car because when i start my car the rpm is at 2800 cold and when it gets warm iddle is at 1500 i know thats not normal and after a while the iddle would go up and down ....can anyone tell me ?

 

Is it throwing any check engine lights?

 

does it have a check engine light on

 

no engine check light is off and the motor runs fine