91 dodge 4x4 p/u after a tune up new fuel filter also... the p/u sometimes bucks and sputters... like its cold in the morning... but will do it at any time...intermitently... not all the time just occasionally... Any ideas on what to check or do ????

Would be appreciated.....thanks for any ideas...as to what it could be...

Ron

 

What all did you do on your tune up im sure you did plugs, plug wires, oil change, fuel filter, did you change your pvc valve, distributer cap, rotor button, air filter, did it start doing it after the tune up