i had this problem for quite sometime now..every morning or kapag malamig yung engine mababa yung idle ko pag inistart usually around 600-700rpm although hindi naman namamatayan but i need to step on the gas pedal para tumaas ng onti yung rpm ko but before naman pag cold start nasa 1.1k-1.2krpm ko then baba after a minute or two kapag umandar na. now baliktad kapag umandar nako ng lets say 500meters ayun tataas yung idle ko ng 1-1.1krpm then after ilang kms na tinakbo ko magiging normal na yung idle ko for 800-900rpm. ano kaya possibe na problema? any parts to check?

TIA!