O2 Sensor Question Options

[94celicadude]

Hello all,

After lots of mods and tuning on my 7A, ive decided to completely get rid of both my 02 sensors, I have an S-AFCII on there for tuning purposes.

I was wondering if anyone has ever put in a resistor in the O2 sensor plug in order to "simulate" a proper O2 sensor function.

If not, does anyone know the correct resistance needed for both the O2s to read proper A/F ratio?

PS. its for a 94 7AFE

This post has been edited by 94celicadude: Mar 10, 2010 - 4:09 PM

[Bitter]

its not looking for resistance, but you know all that already right?

This post has been edited by Bitter: Mar 11, 2010 - 7:42 PM

[94celicadude]

its not looking for resistance, but you know all that already right?

quite on the contrary, it actually is looking for a given resistance.

And yes cheesy I understand that the resistance is constantly changing, i was just curious if anyone knew of the correct resistance when the A/F is near optimum stoichiometric efficiency.

I appreciate the help and the info so far.

Has anybody ever found any proper way that to eliminate 02 sensors on OBDI cars?

[tankd0g]

its not looking for resistance, but you know all that already right?

quite on the contrary, it actually is looking for a given resistance.

And yes cheesy I understand that the resistance is constantly changing, i was just curious if anyone knew of the correct resistance when the A/F is near optimum stoichiometric efficiency.

I appreciate the help and the info so far.

Has anybody ever found any proper way that to eliminate 02 sensors on OBDI cars?

You can buy emulators on ebay. You need to create a square wave, a resistor is not going to do that, you need to build a 555 timer or other square wave oscillator circuit. Cutting both sensors out of the system seems like it's going to get you a blown motor unless you also have EGT with that setup? Relying on maps leaves you no way to account for changes. Honestly I don't know how your car would even run in anything but the conditions you tuned it for.

You may have read somewhere that you can fool the ECU with a resistor. Well you can but that is only for the heater circuit, the other two of a 4 wire O2 sensor. It stops it throwing a CEL code if the O2 sensor pre-heater is missing/faulty. It has nothing to do with the air/fuel mixture.

This post has been edited by tankd0g: Mar 14, 2010 - 7:49 PM