My '98 Xj sport 4x4 will not pass smog ( California ). Though my tail pipe is clean (emissions wise), I had no active monitors thus failing smog. At first I thought the Computer was hung up because I had problems with the idle position sensor but, no check engine light. So, I erased all drive cycles with my obd2, planning on re-setting the drive cycles/driving. ( I had nothing to loose) After a couple tanks of gas and several hundred miles, I decided to scan my computer once again once again. I had found that the oxygen sensors, fuel, catalysts, misfire, and evap had run their drive cycles. I was almost there! When I scanned the car the next day, I had lost my O2 sensors, evap, and catalyst. What the hell?? So, yesterday, I drove the crap out of it, and had completed all drive cycles but the evap. Again excited! I went back outside and scanned the car, all drive cycles were gone!! Am I loosing power to the pcm? Some how, my drive cycles are getting erased when I turn off my ignition. Has anyone heard of this? Is my igniting switch killing power to the pcm? My radio is not losing power. My battery is new. Thoughts? Suggestions? Anything?
Last edited by 67dartgt; 02-15-2015 at 07:23 PM..