my 95 deville started sputtering real bad so i pulled the codes and gota cde for the ignition coil. well i changed the distributor,wires,rotor, spark plugs, and distributor cap, then after driving about half a mile it sputtered lightly. seems like when it warms up thats when it sputters. it shows no codes passed inspection with flying colors. i bought the distributor from autozone. do it sound like its a bad part. can a weak fuel pump cause these problems once the car warms?