Cleaned my old idle controller when it ranged from 5-600 to 1500 when hot
Worked great at 1500 when cold
The cleaning did not help anything
I was very annoyed so I bought a new one

SO
Still nice when cold 13-1400 rpm
When it's hot, it varys between 1000 and 500 RPM. After a long time it finds peace of about 700RPM, but it does not last long, and it's time for the perfect idle speed search agan.

It also looks after idle when I drive to, as if you carefully pump the pedal at idle speed rhythm

When I give it some throttle it drags smoothly at any speed

The old one also did this.

Some ideas ?
getting crazy