My 93 300zx n/turbo 5 speed hesitates or stalls, It does it only once or twice every time i drive it, but the accelaration drops dramaticly even when I'm stepping on it, until I let go and shift it. Please any help would be appreciated.

 

Could be a few things, but here is what I would look at first.

If the engine is stalling only when its extremely hot, then you might be suffering from "vapor lock", but since you didn't mention any overheating I'll assume its doing this at normal engine temperature.

If its stalling and hesitating at normal engine temp I would check the fuel pressure regulator, your engine is likely starved for fuel.

Hope that helps,
Adam
1996 300Z TT

 

Check your injectors I had the same problem and once I replaced all 6 injectors it runs perfect.I must forewarn you its not a cheap thing to do.