ive searched the forum and have yet to see these two codes together and wondered if anyone thought there was some correlation between em or if they should just be treated seperately.

p0302 and p0103

changed rotor, plugs, wires and cap to no avail. next step compression maybe? doesnt explain the maf sensor malfunction.
both codes showed after engine showed signs of struggle at idle. tried to repair the #2 cyl misfire w/the usual and no real change. any thoughts?

 

check your maf sensor, that causes running ritch/rough and will damage your cat.