no power below 5500 rpm/black smoke...

Ok…when the car is cold… she drives fine… except… no vtec. This I understand…
What I don’t understand is… after the motors warms up… there is no power and I can feel hesitation while accelerating as the rpm climbs… like the clutch is slipping…but when it reaches the vtec engagement point… the car feels fine.
Also… upon hard acceleration…a big puff of black smoke shoots out the exhaust. There is constand black smut allover the back of the car… on the bumper, tail lights, rear spoiler.
Any suggestions?
Thanks in advance.

do a compression/leakdown test, also when was the last time you did a full tuneup?

tune up…

well…I haven’t done a tune up as yet. That will have to wait till thursday…
I’ll do that and re-post… and let you guyz know how it goes.
I’m planning a total reuild anyways… i’m have to have my boost. I’m a addict. :] But that won’t be till sept or oct… in the mean time… I want her t0 run right… i’m just anal like that. You could understand right :]?