Originally Posted by 94coupeNA

sounds like either one of two things. 1) your car isn't getting enough feul at low rpms so it sputters and jerks. or 2) it might be your timing is off and it's not firing right at the low rpms so all the fuel is not being ignited. Did you change your plugs after you swapped motors? an easily overlooked thing...maybe they're burnt? I dunno good luck.