I have 98 M6 SS Camaro no heavy mods

For the last year the car has been throwing the SES light on and off and while the SES light is on the car runs a little rough and starts bogging really bad. Even when I try toreally get on the gas the car wont get up. I was originally told it was my O2 sensors so I went to summit and bought all new NGK O2 sensors for my car and installed them but not even 600 miles later the SES light came back on and I had to just ignore it because I was at school. Now I am on Winter break and trying to fix the problem but I am clueless as to what I should do next.
The codes I am getting are; P0131, P0137, P0151, P0157, P1133, P1153, P1258, P1546
I believe the P1258 Light came on because my thermo was sticking but I just recently replaced that and have not had the engine really heat up on me since, how ever I have only driven the car twice since then because I am trying to figure what else I need to do to get the car running right again. I really have no idea what I should do next and need help badly!

I was told that the injectors could be what iscausing the O2 sensors to work incorrectly if that is true what kind of injectors should I get? and what size? brand? any idea on a good website to buy them?

Please any advice would be greatly apreciated I have to have this car running by the 19th because I have to drive back to Arizona for school on the 19th and being in the desert is hard enough on a car with out having the SES light on.

 

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