||10-17-2009 02:11 AM
No "check engine light" with headers!!!
I found the fix for running the aftermarket ebay headers! And keeping you CEL light out, hell the monitors even pass! Now this is on a '02 330Ci with MS43, I am not sure if this will work on '03 and later as they run MS45, but if your brave and want to try I'll help you out.
Now not that I am all for taking catalytic converters off your car, it's very horrible and you should all feel bad and put them back on.:blah:
But with that being said, the Innovate LC-1 is a very cool tool that I honestly must give credit to that pie330 guy for telling me about. It is a wideband O2 sensor with a little control unit that gives you 2 programmable outputs and a serial cable hookup for laptop hookup and tuning.
Now this may sound complicated but it really wasn't that hard to hookup, but I would recommend some automotive and electrical experience and a good soldering iron.
So with the headers installed hook up your 2 pre-cat sensors, this should leave you with 2 bungs left, well plug one and install the Bosch wideband O2 sensor in the other. Now I know your only reading one bank but this is the best I can do for now.
The Innovate controller fits under the engine cover nicely. ( I'll get some pics here in a day or two) I used my old connectors from the old post-cat O2 sensors, installed a 50ohm 10watt resistor in each of two sets of white wires, these are the O2 heater ciruit wires.
For the signal and ground wires it gets tricky. So we should have two wires left over at each of your O2 sensor connections, now sensor side wiring changes so reference the engine harness side for this. Bring the two wires together that connect to the yellow wire, and wire in about 3' of small yellow wire this is the Analog1 output from the controller. Next bring together the two wires that connect to the black wire, again 3' of small black wire, this is the signal ground. Bring this signal ground the yellow wire and all the associated LC-1 wires in a nice loom into the e-box, you'll even find a grommet you can use.
Once in the e-box lift the DME and the bracket that it's held into up and expose the chunk of red-white and brown wires underneath. Connect the sensor ground wire and the white and blue LC-1 ground wires to the splice of brown grounds under the DME, next connect the LC-1's red wire into the splice of red-white yellow dotted wires. Connect the yellow wires together.
Well if your still with me the hard part is done, fire up the laptop and load the software. While your doing this there is a bit of a calibration hoop you need to jump through, the directions are in the box with the LC-1.
Once you load the software go to Analog1, select "use air-to-fuel ratio" and program in .650volts at 18:1 and .100volts at 22:1, then go to advanced and select 1/3 second delay. Program all this in and clear you old catalytic converter efficiency faults and then go out and enjoy.
I have played around with this voltage curve a little and this curve finally got the monitor to pass, as I datalog more cars I'll update any changes I find. Hope this helps, I have found many cool ideas on this forum and wanted to give something back.