hi all my ka 1.3 1998 has rough running problems when its cold it runs like it has no choke and struggles to accelerate when its warm it idles ok but when you accelerate it feels like your bouncing up the road and somtimes hesitates.
With the bonnet open and moving the throttle a little you can hear a air sucking sound
please any help apprecated

 

Find the place where you hear the sucking sound and repair this leak.
If you spray brake cleaner around the suspected leak you can hear the engine rpm's change when you spray directly onto the leak.

 

As said does sound like a running lean problem, so fix any leaks first.
tabetha