[928uk] Engine vibrations around 2000 rpm, any ideas...

[Richard Armstrong]

>
>I is a wonderful driving experience every time I take it for a ride;
>but now the engine has started having  what I would call abnormal 
>vibrations around 2000 to 2400 rpm.
>
>Pete the Dane.

Is it vibrating when stationary, or on the move, or both?
How is the vibration at higher revs?
Could be your engine mounts, but at 37K I doubt it - is the car garaged 
for long lengths of time?
I would check the HT circuit first - especially caps, and leads, and 
plugs - open the bonnet in the dark and look for a fireworks display. If 
the car stands for long periods the HT system gets damp - You need to 
drive it more, 3500 miles a year is simply not good enough!!
Richard