2.3 10v in 90 Q rough idle trough out RPM's
 

So i got a new to me 1989 90 Q and just passed MOT check but i have idling problem, sounds like a missfire in a cylinder or even just a valve.
I will get the car tomm. and change the spark plugs, check the cables etc. but i was wondering if there is anything specific about those cars that will cost a missfire (rough idle).
i can hear its still there even on higher rpms.
Any help would be usefull.
Thanks

Re: 2.3 10v in 90 Q rough idle trough out RPM's
 

The idle stops as soon as you put your foot to the gas, so its something else.
Do a wet compression test and a leakdown test.

It could also be a bent valve, I have seen novices do a timing belt change and turn the engine over to align the marks.