1999 Chevrolet Venture Misses through out driving range

The van misses out, like a cylinder not firing. I have no codes at this time. I replaced the cam sensor due to a miss fire code. This was the last thing I did and now it runs worse then it did before I changed it. Let me give you some details: I have had a miss fire code for some time now and this is what I have replaced before replacing the cam sensor. Replaced coil pack, replaced wires and plugs, replaced EGR valve, replaced intake gaskets upper and lower( They were bad anyways) tested injectors: right at 11 ohms on each, with new O rings. New air filter, cleaned Mass air flow with electronic cleaner, New TPS and IAC valves. Replace all evap equipment (Due to evap code). This is a 3.4L Chevy Engine. This also idles kind of rough at sometimes, it idle rough all the time before I replaced the cam sensor now it just does it sometime. When I take off from a stop it bogs and pops. Can you HELP? I'm about to dump this thing in lake Michigan! ( Not Really!) That's what I fell like where it belongs! Thanks