Everbob1984

I got my Z32 a month ago its 2+2 90 but has a 94 motor in it, i just replaced my #6 injector it was ohming @ 54 rest 12-14ohm runs smooth now but still lack of power and studder on take off seems like my timing is retarded but checked and its 15* and MGP seems real low like 10-15mpg, make long post short i have cleaned all connections, NO CEL fresh oil, 91oct fuel (Shell) i dont understand and i dont know anyone in the area into Z's only freaking honda but 0-60 is like 20 sec seems slow this is m 1st Z32 i own a 240z and its ALOT fast ATM so any help would be great!