hi guys, this mornin and for the past few morning the car didnt wanna wake up propley - basically when i start it from cold it it runs like on 2 cylinders until i pull a spark plug lead out the head it wakes up then all fours are on song

iv just fitted new 071 plugs i got yesterday too, i thought it needed new plugs

and the head all of a sudden now sounds like a fietsa 1.1's head its gone so loud and clattery i had to top up as the last set of plugs were so bad i lost loads of oil through burning, now i have topped up it still makes noise

please advise