Wideband O2

[m1tch]

Hi all,

I will be looking to get a wideband O2 sensor at some point soon to then wire into the PFC so I can check the fuel mix etc, I am looking at the Innovate LC-1 and the LC-2 has just come out it seems, there is also an AEM setup with gauge etc which is also quite tempting - they will all work on the PFC and datalogger I have.

Just wondering if I can reuse any of the OEM bungs to run the O2 sensor or if I need to get an additional one welded in, previously I have had a wideband run where the OEM O2 sensor was as it also had a signal feed that can be spliced into the OEM loom.

Because I am going PFC I am guessing it won't use the stock O2 sensors as usual, was thinking of fitting it in the main cat but I am guessing this won't give me the most accurate reading?

[1979scotte]

Put one in stock location on manifold.

[m1tch]

Put one in stock location on manifold.

Will do, I am guessing as the PFC is a standalone ECU it won't mind if there aren't all 3 O2 sensors plugged in considering the wideband will be superior to the stock ones, although it would only be reading 2 of the cylinders.

[1979scotte]

Put one in stock location on manifold.

Will do, I am guessing as the PFC is a standalone ECU it won't mind if there aren't all 3 O2 sensors plugged in considering the wideband will be superior to the stock ones, although it would only be reading 2 of the cylinders.

This I don't know.
My PLX wideband had an output that mimics the standard 02 sensor so as not to upset my stock ECU Piggyback combo. Not that it did its job.

[Essex2Visuvesi]

My Setup is a little different, the 2 stock O2 sensors are just past the turbo elbow and the Wideband is further down the downpipe
The apexi reads the 2 stock O2 sensors as normal and the wideband is read via the FC-Hako

[m1tch]

My Setup is a little different, the 2 stock O2 sensors are just past the turbo elbow and the Wideband is further down the downpipe
The apexi reads the 2 stock O2 sensors as normal and the wideband is read via the FC-Hako

Thanks for confirming, will need to get the wideband to be able to road tune it though unless the PFC can adjust the fuel trims like the OEM setup?

[alancsalt]

On my NA 2ZZ I had an extra bung welded in, just before the cat. Only using it for a gauge. Innovate LC2.

[m1tch]

Will look to pull the trigger soon on the wideband, would be interesting to see what sort of AFRs the stock ECU gets to or the Dastek etc.

One thing I am thinking of however is to run the wideband post cat in the 3rd O2 sensor position - I know that dynos sometimes use a tailpipe sniffer to measure the O2 to tune, the cats job is to turn CO to CO2 so therefore the O2 level wouldn't really be affected. The O2 sensor would also be heated so it will still be in its operating temperature window (actually 2 of the 3 OEM O2 sensors have a failed heater element and passed the MOT with flying colours).

I could look to mount the wideband in one of the manifold O2 sensor positions, however this would mean I would only be getting the AFRs from 2 of the cylinders vs the 3rd O2 sensor which would be all cylinders - probably ok to do as the fueling should be ok across cylinders and could always swap over the sensor to check is the case.

The PFC can switch off all stock O2 sensors and can run without them - meaning no constant fuel trim correction as the OEM (or indeed piggyback) ECU would usually do, I can switch this off via the commander.

I think I might however just need to get an O2 bung welded in.