i have a 1989 ef with a stock d16a6. the motor has over 175,000 and recently replaced plugs, plug wires, cap and rotor, air filter, clutch, and for some reason, not all the time when accelerating the car starts sputtering. usually its when i'm in first gear and getting up to speed. any help would be appreciated. i know i need to change the fuel filter could that be it?