vibrator

It has been suggested to me that the 5 cylinder is a bit lumpy at idle due to age and firing order

OK I HAVE actually found something that worries me on my car. At idle, the vibration from the engine is horrid, my teeth actually chatter. I dont recall it being like this before, maybe it was and I now notice it more. Its like its idling too low or something, sitting at 750, not quite as bad...

Opps I meant vibration of course. In my 145 & 2 146's I noticed there is a vibration when the fan is run a 3 or 4 speed. Anyone else's suffer from this ? has anyone fixed it ? if so how ??