Skyline

I've been having some issues with my Jeep lately and it has been throwing different codes around, but I am not sure where to start or what the problem is. At first I thought it was spark related but now with these codes I feel like its fuel.

The codes are:

P0202 injector circuit open cyl 2

P0201 injector circuit open cyl 1

P0206 injector circuit open cyl 6

P0300 random multiple misfire

P0301 cyl 1 misfire

P0302

P0455 large evap leak

P0171 system too lean bank 1

Now I did some splicing on an 02 sensor that might have failed finally so I expect to replace that but don't think it will fix the injector issues. I also have hard time believing 3 injectors have gone bad simultaneously. They are 781 injectors I put in last may.

If anyone has ideas on where to start it would be greatly appreciated.