recently changed opti on my 93 z but it still aint runnin the same way. i tryed to power brake other day and it started sputtering then stalled. what else could it be. it also sputters when you punch it at low speeds

 

Fuel problem maybe. How long has it been since you had the injectors cleaned? What is the pressure doing when the problem occurs? How old is the fuel filter? Is there fuel in the FPR vac line? What's the fuel mileage like lately?

 

**** couldnt really tell you, i know i've changed the fuel filter, ran some fuel injector cleaner through it and changed the cap and rotor. i would like to know where else to start so i can narrow the problem down.