I have a 2005 STR, didnt have no 02’s since i got the car since it was decatted. decided to install 02 sensors as well as change plugs, valve cover gasket, fuel filter, and did the mina intake and all at one time. i got a code saying “system too lean bank one and two” have restricted performance light on limiting me to a 3,000 rpm limp mode issue. any thoughts? could be maf, intake leak or such? can’t put my finger on it or where to start from...

 

I find best to validate how lean actually. Get an ELM327 with an android phone and the free torque app. Chart the 02 voltages, see if they are cycling or bottomed at zero. Check at idle and while driving. If they are bottomed they could be dead. There have been a rash of bad 02's new out of the box, sometimes you can test by unplugging the MAF, see if it changes the voltages.