Idling problems and solution

[Landcrab]

Hello everybody and hope you all are doing fine despite the situation at the mement

Maybe this is obvious but I write anyway.

I had an S2 for service 3 carb car with rough idling and also a quite uneven run when driving. After quite som fine tuning of the carbs and ignition it ran quite well slighty high idling but with the behaviour that when I was rewing the engine and dropped the accelerator the engine almost cut of and slowly got back to the slightly high idling. The reason for this was found to be not the carbs but the lid on the vaccum one way valve that was broken. Now it starts and runs perfectly fine. Maybe this can save a few broken hairs out there if this happens to someone else.

Best Regards Johan

[keithmac]

Hi Johan,
Do you mean the lid on the valve above the brake vacuum reservoir ?
Regards,
Keith

[Landcrab]

Yes that's correct. The lid is pressed on and not supposed to open at all but this one did. When the airfilter is of it’s not easy to hear airleakage from the vaccum side.