Idle speed fluctuates after warm-up

[nestor]

Hey guys - my 1998 Baleno (G16B engine) starts-up first turn of the key. After warming-up (say about ten minutes) the idle speed fluctuates , and if you are driving - the car starts to buck.
I changed plugs, plug wires, cleaned actuator, intake body, but it still happens.

HELP Needed.

[ganeshlalchan]

Recently started or for a while now?

[nestor]

It started about six months ago.

[deivid]

is there oil in your spark plug

[trini iceman]

This solved?