Hi guys,
I have a problem with my A7 (2011 3.0 TDI - 204 HP), when at stand still. They key issue is that the car at stand still can have irractic idling. I have experience the following issues:
- Stand still: when the car is idling St the lights, the car sometimes has irractic reves, the rev counter moves up and down. You can feel the judders from the engine, and the revs even drop to the point the car is about to stall, but then recovers. I understand the car doesn't have a choak, so not sure what would cause this.
- Stop start: a number of issues occur when the start stop system engages, all depending on luck I think
- After stopping, when it comes to start again, the car go's into start then stop over and over again (experianced this a few times)
- Sometime it stops, when its time to start again, the car will start but the start motor will stay on (experianced this a few time)
- After stopping, when starting again, the starter motor will start but the engine will not (experianced this once so far).

To resolve the start stop function issues, I had to turn the car off, leave it for a few minutes ( which is difficult at a set of lights with annoyed driver behind me), then start the car with the button. The other option is to disable to start stop altogether, which results in the car having irractic revs at idle.

any help or ideas of the issue would be apprciated.

Thanks