1994 gmc truck 5.7, sputters on acceleration-idles fine. new cap,rotor, distributor, plugs,coil, wires, temp sensor, fuel pump. fuel pressure checks out, relay checks, timing is close, no frayed wires. egr?

it did this previous to installing new parts. when i finally replaced ignition module in distributor, stopped sputtering, but eventually came back. just replaced distributor, still does it, but runs much stronger and sounds much better at idle.