ok i had my pc programmed the guy ddnt do it right my catylitic converter went bad so i got a new magnaflow and it started backfiring so i took the car and had it programmed again it quit backfiring and tonight i came hme and it threw a check engine light low efficiency catylist bank 1 again is my cat bad or is it the sensors and is there anybody around in my area that can help me reprogram my pcm right the only mods i have is the ubend delete and flowmaster mufflers and was a magnaflow cat but i think thats bad idk can anybody gimmie an idea on wat to do ? and i was wondering if 4 degrees of kr is normal thats wat his laptop said i was gettin any suggestions plz
