weak starting gremlins

[bcoats]

Hello fellow 930 bretheren - seeking input on a weak starting issue, motor cranks but when it does fire it's very weak and chugs at idle around 600rpm's or so, does this more intermittently both cold and warm. Car has new injectors, plugs, wires, cap/rotor, ignition coil (Bosch silver) fuel accumulator was replaced couple years ago, gas is fresh, CDI box is original, wondering it that's going or a fuel pump issue?? Thanks for any suggestions