Avansis 2.4 sporadically takes no gas.

Hello, I drive the AV 2,4 VVTi and have had the following problem for about a month: if the engine is lukewarm the car takes sporadic no gas. Sometimes it happens when starting up, the car then rolls in the range between 2000- 3000 rpm only the pointer of the rev meter the car rolls in front of it and only from 3000 rpm the AV gets thrust and runs. In this speed range between 2000-3000 rpm the car does not react at all to the accelerator. d nothing happens until 3000 rpm is reached. It happens when starting up and also while driving, when the engine has not yet reached the operating temperature. After that it runs again without any problems. Does anyone have an idea or know what it might be? Thanks.