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View Full Version : how does a O2 (Oxygen) Sensor work?

damo_mk3
29-09-04, 02:21 PM
i mean in working out your air/fuel mix and wear is the best place to mount one (in zost) been looking around the net but not found much. Im planing on using one to moniter my air/fuel mix but knot a clue how it work etc... :crybaby: so i need to hit the books :bigeyes:

thanks
damo
buttmunch
29-09-04, 03:09 PM
It measures the amount of free oxygen in your exhaust gas, and swithces between lean and rich trying to keep your fuel mixture at 14.7-1 Stoichiometric. It is primeraly there to keep your catalitic converter at its optimum temperature.
damo_mk3
29-09-04, 06:16 PM
It measures the amount of free oxygen in your exhaust gas, and swithces between lean and rich trying to keep your fuel mixture at 14.7-1 Stoichiometric. It is primeraly there to keep your catalitic converter at its optimum temperature.

i see

thanks Damo
Nodalmighty
29-09-04, 08:41 PM
i see

thanks Damo

If you buy a Apexi Turbo Timer you get a AFR monitor which just connects at the ECU into your OEM narrow band sensor wire. I think you can get them for about £70 and they also act as a volt meter too as well as err, a turbo timer.

Nod.
damo_mk3
29-09-04, 10:18 PM
well i mite get wide band sensor! but thats not bad for a turbo timer

damo
Nodalmighty
29-09-04, 10:35 PM
well i mite get wide band sensor! but thats not bad for a turbo timer

damo

If you want wideband then figure on spending about £300.

£250 for the TechEdge WOB2 DataLogger box with display and all cables, £50 buys the LSU4 6066(GM) or 7057(VW) wideband Bosch sensor.

You can spend a LOT more but as the TE one is very accurate and has 7 extra data logging channels (3xTC's and 3xTTL and RPM) I see no reason why you would want to.

AEM = £550 Has a fancy display but only reads down to 11.0:1 AFR which is not enough for the really silly power stuff.

Motec one is very good at £1500 as it's the very same unit inside the DynaPack ;)

Nod.
damo_mk3
29-09-04, 10:48 PM
If you want wideband then figure on spending about £300.

£250 for the TechEdge WOB2 DataLogger box with display and all cables, £50 buys the LSU4 6066(GM) or 7057(VW) wideband Bosch sensor.

You can spend a LOT more but as the TE one is very accurate and has 7 extra data logging channels (3xTC's and 3xTTL and RPM) I see no reason why you would want to.

Nod.

thats sounds about right for me will add it to my shopin list thanks for info nod