hi all as title says , car has been fine up till the other day when it started to cough and spultter then picked its self up then the next day started to do the same thing again( rough idleing ), have no loss of power no lights on as yet, but have noticed the when its idleing every other minute i can feel a small knock were the timing chain is and when it does this the engine note changes (as if its going to stall) there has been no timing chain fitted(95000 miles on clock)to my knowledge.
any help would be greatful .

thanks clembo