ok well i have an 81zx n/a and i really dont get much acceleration starting off....it will hardly even peel out (unless i pop the clutch)...but once it gets to about 3 grand it accelerates like no other...also it doesnt buck..so im thinking that its not the fuel injectors....i mean its not like i would have burn out contests or even peel out but u know...its not that i would its that i could 