Last spring, I modified my car
- and then modified it again
The 2nd modifications entailed me re-programming (or flashing, or tuning) my car's computer. One thing I didn't realize at the time was that evidently, a standard protocol for most tuners out there is to turn off the O2 sensors which monitor emissions after the catalytic converters.
This doesn't mean squat to pretty much anything, unless the state you're living in requires emissions (or smog) testing.
I went in to have my car checked out yesterday, and lo-and-behold, it failed because 2 of my O2 sensors were in a "not ready" state. After a bunch of driving (trying to create "drive cycles" in vain) and googling, I found out that the tune I had installed in my car last year had in essence, completely turned off the O2 sensors.
So, the fix was easy:
I re-tuned it with my SCT tuner with a canned tune. In going through the questions, one of them was obvious, "Turn off O2 sensors?
" I answered the negative, and was on my way.
I then spent last night driving around with a good friend of mine, and at one point, nearly missing a huge recently desceased deer in the middle of the road. Hehe... That was fun.
In driving around yesterday, I managed to create drive cycles for all but one sensor, which was fine, because in Utah, they allow one sensor to be in a "not ready" state, so... I passed emissions!
Also, as soon as I got my "all clear" certificate, while in the mechanic's parking lot, I re-installed my original kick-butt tune. Good for another 2 years.