Lc1 as O2

[__TT__]

Question:

I'm running a pp6 and have a Lc1. I see how the lc1 wires into the pp6 but I don't know what happens to the o2 sensor?

I've researched on the board and have seen a lot of people saying the lc1 is not good to use as a narrowband. is this still true when running it through the pp6 first? Or is it ok to run the Lc1 as a wideband into the input of the pp6 then the pp6 will adjust the signal for the ecu for narrowband use?

PP site shows this:

5.1 LAMBDA TUNING

This is required if tuning is needed in the "closed loop" operating mode of the engine. The oxygen sensor has a voltage output of 0.2 to 1.00 volts, which can be "tuned" up or down as required. Some ECU's respond slowly to the input, some are fast! Locate sensor, and trace wire to the ECU. Measure with voltmeter while engine idles: it should read 0.5 volts, or fluctuate up/down around 0.5 volts.

Two functional different connections are possible.



a) Run the Lambda signal through the SMT6 as any other analog signal: INPUT@AIN, pin6, blue, OUTPUT@AOUT, pin 18, violet. This requires the use of the analog limits to make clever use of the Lambda range.
b) Use the Lambda display input as the analog source (Lambda Tune: Y). The output is on AOUT, but the input is on pin 22, black/brown. The Lambda display is from the input. In this mode the SMT6 makes use of the increased Lambda resolution and a special algorithm (un-linear) is used for tuning. This method requires no analog limit.




Right now I'm running #22 T'd to the O2 senser.

Neither one of these options seem right due to #6 and #18 are being used in our setups as Maf Sensors in ref to http://bbs.legacycentral.org/viewtopic.php?f=19&t=39364

[wtdash]

Hi,
Since you don't have any feedback.....

Disclaimer: NO experience w/a PP6, but did wire in a Greddy Emanage Ultimate.

My guess is you still need the O2 sensor separate so the stock ECU can do its thing...My Greddy Emanage piggy-back did. The PP6, also a piggy-back, likely uses the LC1's wideband info, and ignores the stock 02.

So, you'll need another bung to run both sensors.

Td