2001 5S "Turbo"
You can maintain 80mpg with or without lean burn. The difference will be in the pedal position, and how open the throttle is.yesterday I was monitoring A/F and noticed that the mpg readout on the dash doesn't always correlate with the LB. Sometimes I would be in LB and the mpg would read 70-80 mpg, and other times I was not in LB and the same figure showed. I understand sometimes it takes a minute for LB to kick in. Can someone please explain if LB correlates with mph on the dash display since I know LB will produce better mileage.
My 01 CVT with retrofitted JDM lean burning ECM lean burns with IMA battery, junction board, mcm and bcm completely removed. This is indicated via odbiic&c led indicator, FCD mpg reading, and “seat of the pants” stutter feeling.Does lean burn work with IMA disabled, does it not work, or does it work on some cars and not others?
Well yes I'm aware of the code being a CAT bank 1 below efficiency. But KLR3CYL had the same thing happen. His threw a P0420 and that wasn't the issue. Granted I can check the CATs, but when I previously pulled the CAT O2 sensors and peeked inside and it looked okay to me, I didn't see any crumbling. Assuming that's not the issue and it's the sensor, I would replace the second CAT sensor correct? Or am I still misunderstanding. Feel free to correct me if I am.The car in this original post had a bad primary O2 sensor. The sensor was the early 5 wire type that was replaced. The only sensor that should be used for this on the 2000-01 models should be the NTK 24301.
It’s nice that you’ve cleaned and changed the EGR system and valve, but that won’t fix the problem.
If you are experiencing a P0420 code, you potentially have a catalytic convert issue or an issue with the software in the ECU. A P0420 code is, catalytic converter below efficiency. The second O2 sensor is what reads the exhaust gas after the first cat. If the exhaust gas is dirty the second O2 sensor tells the ECU the catalytic converter is not doing its job and to send a P0420 code, triggering a check engine light. You could also actually have a bad catalytic converter. In many cases if the catalytic converter is bad its starts to crumble internally and clog the exhaust. If you have clogged exhaust, the car typically has a bad lack of power under acceleration. A crumbling catalytic converter and a plugged exhaust usually cause fuel trims to wildly vary. If you have an OBDII device and set it to read fuel trims, you should check this.