B16A SIR Bogging under load.???

I have a civic hatch 1994 sir2 import b16a dohc

Starts and idles fine, when driving it feels like it has no power and when i press the gas it just doesnt go like it used to even in vtec it does not pull as hard.

I have checked timing compression and valves and all are bang on.

I have changed cap, rotor, plugs, leads, air filter, fuel filter, oil, run injector cleaner and still it does it?

Has anybody got an idea what could be causing this

the engine has only done 45k miles.

I have checked each plug for spark and its all ok.

it seems to do it more when warmed up also.

Pleas help:rolleyes:

tps?map?egr? vac leak? could be anything.

check your cat... my gsr did the same thing.. cat was clogged