i have removed the K&N set, cleaned the throttle and the filter, returned it back, the vibration has reduced by almost 80% but still there is little, the new problem is that if i have the car on natural, the RPM will increase by it selft to 2500 then goes back ,,, any one knows whats wrong?

i also had a massage on the panel saying, reduced power, and the stability turnes off, this happens when i go fast and get to almost 7000RPM, any one can explain?

 

I made my own set up using the K&N filter and the OEM air box. I used silicone duct from the box to the intake. No rattles and no vibration plus no hot engine getting in my system like the other K&N CAIs