Wont rev past 3000/3500rpm. 2.3 16v

Hi all...I have trouble reving past 3000/3500rpm especially when still warming up(obviously i dont make a habit of this) but this sometimes happens at normal running temp as well. When using just a very small amount of throttle i can sometimes get past the barrier but if any more throttle used thats it! no chance.... Would you go for Fuel:-regulator,pump,relay.fuel element actuator, or any other ideas please?
New bits so far:leads,plugs,dist cap,& cleaned cleaned all injection/air system. tks in advance

[vrsmith]

How is the exhaust system? Look for squashed pipes. A
plugged catalytic converter or muffler might cause trouble
like you are having.

Hi Vaughn..... exhaust seems to be o.k. & its 1986 euro no cat!
tks for the idea though

[Benzmac]

It sounds wierd to say, but I'd bet bigggg money on the ignition coil being fautly.
(I have had this before and it took me back to school.)