well ive been running the same mods for about a year now ( axle back and Custom SRI) last week a CEL came up it said bank 1 was to rich, i cleaned my filter and reset my ECU and it came back a few days later any ideas on what to check next ?

 

plugs?

 

I would check for any sensors out of range.....like for say your ECT.....If it reads -20 degrees and your IAT is 80 degrees you have a problem....sometimes an ECT will not throw a code.....also a faulty MAF/IAT reading will make the car run rich...just a few things to check....

 

i switched it all back to stock and reset everything it went away, i think im just gonna order the RRM one