i have recently built a y5 block and z6 head with the new style fj I-beams. i have put it together and it runs but when cold it idles real low, which i am assuming is because the coolant lines that are going through the throttle body are not hooked up, but my main concern is that it will idle and idle and idle and i can rev the motor sitting still..... BUT when i go to take off it has absolutely NO power AT ALL. i can be @ full throttle and nothing. it pops back through the intake which i have already checked the timing tons of times i have tore down and bolted the head back multiple times, being i had compression issues because the machine shop didn't do my head correctly and i had to trace the problem down. but i am now @ like 115-125 psi of compression on all cylinders. the motor only has like 2-4 hrs of runtime on it. but me and my buddies are both kind of out of ideas at the moment so any constructive help would be greatly appreciative.