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Old 09-04-2001, 06:03 PM   #1
Scoobyslack1
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Default O2 sensor problem w/S-AFC and A/F ratio gauge

First off it is a 0V-1.0V O2 sensor. The motor is an EJ22T running on a 1.8L ECU w/idle control valve as the only error given by the ECU. I just put in an S-AFC and a A/F ratio gauge but both are not working correctly.

Would the error confuse the s-afc/gauge?
What's up with it?

Thanks Alan
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Old 09-04-2001, 10:06 PM   #2
wac
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I don't see how the S-AFC and A/F gauge should not work. Are you certain that they are hooked up to the O2 sensor signal? Is there otherwise voltage on that wire? What ECU wiring diagram did you use?

The idle control valve code may indicate that you forgot to connect that connector, or if you obtained a complete EJ22T motor, that the idle control valve is different (or wired differently) on that engine? But it shouldn't bother the O2 sensor signal.

-WaC
Wayne
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Old 09-05-2001, 08:03 AM   #3
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Make sure that you have proper ground. It's very important (maybe that's obvious) and will cause problems, especially with the oxygen sensor.

Steve
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Old 09-05-2001, 08:30 AM   #4
Scoobyslack1
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The idle control valve error is due to the 1.8L sensor getting info from a 2.2L turbo motor, different perameters, hence the error.

The O2 sensor is from the 1.8L motor so the ECU will not have a problem with it. The A/F ratio guage is indeed wired straight into the O2 sensor. The only thing about the O2 sensor is that it has 2 white and 2 black wires...
I'm not sure how the installer picked one wire and not the other, but his skills (not mine) or lack there of is another story .

My next step now is to use a volt meter to check the voltage from the O2 sensor.
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Old 09-05-2001, 01:34 PM   #5
HRE | giulio
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This is what i had to do...

disconnect the a/f meter, so only the safc is reading off the o2 wire (at the ECU).
warm up the car (and with it the o2 sensor)- after a few mins you should have 'normal' readings again. Drive it around and see if you do.
If so, then you can disconnect the SAFC from the o2 wire and plug in the A/F meter's wire instead- don't use the o2 from the sensor, use the one at the ECU as you did with the SAFC.

I think when you hook up both and/or a bad ground, the o2 sensor doesnt heat up properly. Resulting in 1/10 the reading that it should.

Good luck,
g
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Old 09-05-2001, 02:04 PM   #6
Scoobyslack1
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The S-AFC is hooked into the ECU and the A/F meter is on the O2 sensor.
Other O2 sensors I've seen have only 3 wires mine has 4, anyone know why or what they're for?
Now that I have the munual for the S-AFC I can try to work w/it.
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Old 09-05-2001, 03:38 PM   #7
HRE | giulio
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if you look more toward the o2 sensor, you will see 3 wires. 4 is on the clip to the car.
just use the ones at the ECU and you'll be fine.
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