i have a 1990 2+2 300zx n/a and the rps seem to flutter when its on .. my 300 lags when i press the gas and some time it starts to budge on me . idk what it could be can anyone help thanks

by the way its a automatic

 

i mean rpms

 

Test the resistance of your injectors. Chances are, several of them are dead.

Should be 10-14 ohms... search for details on how to do it if you don't already know.