Weird Throttle problem

[dorf]

Problem with ( europe model) Ford Fusion 1.6  2009 petrol idle, when car is not moving and pushing Throttle pedal there is cap between 800rpm--1400rpm.

RPM goes 800rpm to 1400rpm, this is difficult to explain.
After 800rmp Throttle pedal moving normally (nothing happen) 1or 2 cm and rpm not rising.. but suddenly rpm are 1400rpm.

This is not happen when car is moving , tested in speed and gear neutral all working well.
Tested in Ford dealer tester nothing found ( new software installed no help).

 

sorry my poor english i`m from... Finland

 

[Alan18]

Have you tried cleaning the mass air flow (or replacing)?