2G Two codes: P0141 and P0443

[ez1286]

I just got a 2g gsx it's got a 6bolt, evo 3, 3" exhaust and some other little stuff. Everthing was going great for the first few days, then all of the sudden monday it started to bog down REALLY bad (like when an ic pipe comes off).Now it idles really badly. I got two codes P0141 (cat is gone so that doesn't matter) and P0443 Which is evap solenoid failure, all the solenoids have been removed (egr, fp, and evap). Would this be making my car run so poorly?
Thanks,
EZ

 

[jspec]

Sorry to bring up an old thread but!!! Did you ever figure out this problem? I have the exact same problem and codes in my 99 gsx. I ordered a new O2 sensor today.

 

[97 gst turbooo]

i just fixed this problem. i had the same codes. my rear o2 sensor was bad and my denso iriduim plugs were malfuctioning. they were gapped at 30 but would really bog the engine. replaced both plugs and sensors and the car was running great. hope that helps.