| Six P's When I buy any used car, I always replace the plugs and do a general tune up. It's a good place to start and can be done along with the 6p's. Power loss at the top end can be a variety of things. Clogged air or fuel filters for example. NA Z's have high compression engines. I doubt a car dealer bothered to use premium fuel so you could be suffering from pre-ignition at the top end under load. Would cause a definite boggy feel and will destroy the pistons if it continues. Has it had the timing belt serviced? I'm not positive but I think that a cam that is off a tooth could cause a lack of power at the top end. If you are not sure about the belt, change it just to prevent breaking. I hope this helps. Start with the simple stuff first. It is usually something simple.
KKROFFTNow occurs everywhere, simultaneously. But it doesn't have to be experienced the moment it happens. Every now that ever was is still exactly when it was, when it was now.
Then, in terms of perception, is nothing more than all the nows that are no longer now. Thus, the difference between now and then is when. --The Waystoppers Users' Manual 
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