A Little Idle vibration

[alkrum001]

Hey guys
I have a 2008 golf 1.6 102hp (BSE) 5 spd.
lately I’ve been experiencing slight (though very annoying) shakes while idling.
- RPMs are stable.
- if ac on, problem is smaller but not gone.
- all those hoses and rubber thingies are new, probably not the cause to the problem.
- No acceleration/performance problems while driving.
- weird bass sound between 70-80 km/h (only at this speed, no matter the rpm so strange).
Please help cause I am really out of ideas now

thank you all so much

 

[ROH ECHT]

Most here are familiar with the 2.0t FSI. I suggest you open "Forums" and scroll down to "Regional Forums" and select your Region or those where there's more familiarity of the 1.6L BSE petrol engine.

My guess would be a list because there are simply a number of possibilities.
To begin with the more common;
Intake/vacuum leaks; or leaks in anything connected to the intake manifold.
Faulty PCV.
Poor ignition; plugs, injectors or restricted fueling, or restricted air.