CPS and EZL are most unlikely with those symptoms.

Start simple and cheap. Spark plugs (non-resistor Bosch, Beru, NGK), distributor cap, leads and rotor - MB original is best, followed by Bosch or Beru - sadly, quality from Bosch and Beru is not improving. These engines love 100% HT systems.

When you're happy that HT is good, move on to the fuel system.

RayH