Will this be too loud on a 3.8 NA with stock resonator and mufflers still installed?
Wondering if I should send it back and pay the extra 75 to get the high flow cat from ZZperformance?
You might be wondering why I am going thru the trouble of a cat delete. Well, about 6 years ago I kept getting the P0420 code, so I replaced both up and downstream O2 sensors and still got the code. So then I replaced the cat with a magnaflow (Oriellys) and still would get the code every now and then. So I bought an O2 simulator for the rear and boom, no more code for 6 years. Then all of the sudden I got the code again out of the blue, cleared it and kept getting it. So I was puzzled why I would be getting this code because I have an O2 simulator on the downstream so I decided to replaced both up and down stream O2 sensors with Bosch and obviously got the code again. So then I looked at my fuel trims to make sure everything was good and I noticed my long term was slightly high (+4.8) so I cleaned my MAF sensor and now its back down to +2.0 with the short term bouncing around 0.0.
So back to the stupid P0420, I'm no assuming that the O2 simulator no longer works again but is that possible? I did have it zip tied under neath the car and not up in the engine bay like most directions say to do. SO maybe all the water and salt spray underneath finally worked itself in there and shorted it out?
I bought another O2 simulator from ZZperformance and will try that again I guess but this time I will put the sensor up in the engine bay to protect it from the road grime. Since I would be under there farting around I thought it would be a good idea to slam in a new down pipe from ZZperformance with no CAT but looking back maybe that was a bad idea and I should just return it and see if the new O2 simulator works.