hello guys looking for a bit of advice really. when i start the car while the engine is cold it wont hold revs and seems lumpy if i press the accelerator. but after a couple of presses on the accelerator its fine

also it sometimes seems to have a a sort of light clicking sound coming from the engine (i think). this sound speeds up as u press the accelerator. but after a couple of minutes it disappears :S
Help please !!!!!
Thanks
Kamal