slow96ss

My ses light is almost always on because of the rear o2's being deleted but not tuned out. the ses light will sometimes randomly turn off and come back on after some driving. last time i had the codes read the only ones that came up were for those sensors. recently the car has been running a little rough and seems down on power, stumbles at low rpm. finally got the scanner out to check and make sure it wasn't throwing any other codes and this was the result

4 codes came up.
p0172- system to rich bank 1
p0152- 02 circuit high voltage bank 2 sensor 1
p0174- system to lean bank 2
p0300- random misfire

we cleared all of them and after two days of driving the only one to come back was p0300- random misfire

any of you guys have any advice on where to start checking to figure out whats going on?

flame

iTrader: (13)

Start with the basics : spark plugs, wires