Repeated O2 sensor fail, too lean code, and random misfire.
Hey guys, I have had my 06' Goat for about 8 months now and I have not been able to get rid of my check engine light. Currently I have the codes: P0056, P0060, P0171, P0174, and P0300. 56 and 60 are most likely for my O2 sensor which will make this the 3rd time I have changed it in 6 months. I have a SLP loudmouth exhaust with the cats still in place and SLP long headers. Do I need to get performance O2 sensors to go with the exhaust or is something else behind the problem? I found a vacuum hose had fallen off of the CAI which is what I believed was causing it to run lean. As for the misfire, I'm clueless. I have had that code since I bought the car. I changed the plugs and it went away for about 2 days. I have fought off 10 other codes including, running too rich, too lean, and other O2 sensor failures but the P0300 is always there. I have taken it to the dealership and they suggested getting the computer tuned but the only mods I have so far it the exhaust and headers and I didn't think it would make much of a difference or be worth the money until I added a few more mods. Any ideas?