Jerky idling

Hello.

I'm experiencing an intermittent issue with a rough idle. The engine is shaking quite violently during this. This problem only occurs at idle. If I give it a little gas, it goes away, but then usually returns when the engine reaches the idle speed. What could be causing this?

'Interestingly, when I reprogram the engine control unit to '0001' (automatic transmission), the jerking disappears completely.'

It sounds like this:

http://www.polo2f.privat.t-online.de/Aufnahme3.mp3

Is a '99 ALH engine in a Bora?

Regards,

Paul.

Please use the search function.

Keywords: 'rough idle'.

Best regards, Rainer.