Quote Originally Posted by SuperchargedY8
yeah but the thing is that it idles great and it runs good but if i get on it just sounds like it has no power
Which could very well be the sign of an on-throttle misfire caused by weak spark. The A/F mixture and pressure in the cylinder at idle is easily combustible, but as you push more fuel in there, the overall mixture gets harder to burn.

Could also be the sign of an over-rich mixture at WOT, where not enough air gets into the system. Over-rich could be caused by a mis-tune, or if it's not tuned at all, by some fault in the ECU or something being so far outside of range that the ECU can't compensate. Did you ask the guy if he's got the 02 sensors in the exhaust and still plugged in?

Last, the 3" exhaust is a bit extreme, but does it have aftermarket headers on it? If it's running 3" exhaust with stock manifolds...well.

I'd ask the guy if he has the stock exhaust to go with it just in case, but I'm going to give you the same warning Lexi gave you. Z32's were a wiring NIGHTMARE. If it's a bad spark problem caused by some tiny crossed wire or loose ground or God knows what else, you're going to be spending the rest of your time that you own the car hunting it down more likely than not.