Diagnostic code p0301 idles rough after warming up, check engine lite is on, when accelerating check lite flashes and car bogs down letting up on gas helps engine catch up

Try taking the O2 sensor out the before the cat and try it ,yes i know it will be noisy but try it in case cat is blocked ,if that doesnt work then change the coil pack and check the wiring loom to the coil pack in case the wiring plastic coating has gone all powderey

P0301-

Trouble Code Conditions:
Engine runtime 3 seconds, engine speed change under 1200 rpm, and the PCM detected a misfire condition present in one cylinder during the 200 (Catalyst) or 1000 revolution (Emission) test range.Note: If the misfire is severe, the MIL will flash on/off on the 1st trip!

Possible Causes:

• Fuel metering (fuel injector dirty) problem affecting Cylinder 1
  
• Base engine (compression) problem affecting Cylinder 1
  
• Ignition system (spark plug or plug wire) problem on Cylinder 1