s-10 blazer running rough

I have a 1995 s-10 blazer that is running rough and has no power.I have changed the EGR valve,cap and rotor,coil wire it was arcing,I replaced the fuel injector 5 month ago. Please help!!!!!!

hows your plugs and wires? checked fuel pressure? check for vacuum leaks?

I'm with jackass. Also did you change your nut kit when you changed your CPI? Might be time to pull the plenum again and check for washing (just because your CPI is new doesn't mean it didn't go bad again)