We changed the engine, new wires, plugs, new plenum, all new gaskets, o rings on fuel rack and a bunch more things. My question is, what may be left that would cause stumbling acceleration. It isn't the plugs because we ran existing plugs and it did it, changed to new and it still was the same. I unplugged each coil and noted a slowdown in the engine. I unplugged the electrical plug to each injector, noted a drop in idle with each. So i assume my plugs are fine, injectors are fine, and wires are fine. I changed the fuel filter, and it seems to have helped with acceleration (Once its going, it goes!) but it always seems to be a fight to get there. I'm assuming that it is more related to not the engine, but perhaps a sensor or something that did not come attached to the new motor. This problem has spanned 2 motors, and at first I thought it was merely a crappy 1st motor in the car, but when we changed it, and it an the same as before,i was fairly annoyed. It seems to be mostly with snappy acceleration and not so much with slow and steady.
As usual, any help would be appreciated.