190E 2.3 surging

[Blakes]

Hi all, I have recently aquired a 1986 190E 2.3 16v. It is a little rough around the edges but I intend on smoothing it out. When idling/on tick-over it tends to 'surge', I have been told that this is common. It does quite often stall. What could it be? Idle control valve need cleaning out? Your help would be much welcome!

Cheers, Blakes

 

[television]

Rough idle when cold could be Aux air valve if defective and not opening, airflow sensor wrongly adjusted or binding-sticking, a leaky cold injector or the injector are sticky giving an uneven spray pattern.
when warm, airflow sensor sticking, leaking cold start valve,idle control valve sticky.

Malcolm