I've had issues on & off ever since owning the car. I posted the issues before but I've never got to the bottom of it.
My rev needle sometimes works, other times it just simply stays stationary. Often it will stick at say 1000 rpm or be slow to move - i e the engine is accelarating fast but the needle isnt!
Occurs in cold weather, hot weather. Sometimes when the car has been running for a while, other times when it hasnt been used for a while.
No rhyme or reason.
Thought at first it was fouling on the plastic panel - a gentle prod with my finger proved it wasnt.
Then perhaps it was the bearing on the rear not lubricated enough - so i put a drop of oil on it. But no change.
Finally looked at adjusting the main screw on the back - but that didnt work either.
On the plus side. I can now remove the instrument cluster in less than 5 mins which is a personal best