I have an 01 MPV and the CEL came on and it showed a misfire. So I went all out and changed all the plugs, wires and coil pack. As well as the intake manifold gaskets to make sure there would be no problems. I got it running and the CEL came back on showing bank 1 O2 sensor so I changed it out. Now the CEL is back on again and car sputters on take off. ANYBODY out there have any ideas what could be going on??????

 

Ya stop replacing randomly guessed parts until you find the first cause of the engine trouble code! By simply replacing parts like you did you most likely either missed or created new problems?