Ok eveybody. Let me lay it out for you first. 97 Chevy c1500 work truck. 4.3L Vortec v-6 csfi (central sequential fuel injection). Replaced plugs n wires last year. Also new fuel pump. Ran fine for a long time. Started having starting issues which I traced back to the fuel pressure regulator. Recently replaced that, cleaned carbon from injectors, and got what I could out of the upper intake. Now I'm still having a hard cold start issue. Pulled plugs last night and cleaned them and now she's missing like she's only running on three cylinders. Raw fuel smell at exhaust. Planning on going for new cap n rotor because I know they are original. Any other ideas to point me in a different direction other than ignition system? Or has anyone else experienced this? Any help is appreciated. Also keep up the good work on here.