Idle oscillation

[Z3Mroadster]

I have problem with idle on Z3M-euro S50...

Idle fluctuate between 400-750 rpm and sometimes engine cut out...
Power is okay...

In drive have jerking to 2500 rpm...

What is problem?

 

[t-tony]

@Mnbrennan one for you Martin? I'd be guessing an "air leak" on the inlet side maybe?

Tony.

 

[Mnbrennan]

Could be a stopper on the t junction has popped off, on the vacuum pipes.

Or the ICV needs cleaning / replacing