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Old 03-15-2000, 12:48 AM   #1
Scooby Newbie
Member#: 516
Join Date: Nov 1999
Location: hon., hi.
Question AFC o2 Sensor

I have my APEXi S-AFC blue wire, hooked to my first o2 sensor. I go to sensore check, watch the voltage on #2, the thing jumps from .001 to 1.00 and every number in between. I know the voltage isnt a great way to monitor the o2 but this is impossible...
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Old 03-15-2000, 06:39 AM   #2
HRE | giulio
Former Vendor
Member#: 481
Join Date: Nov 1999
Location: NY USA

I think that sounds right. To use the AFC to monitor the O2 sensor, you need to take readings at WOT (wide open throtle).
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Old 03-15-2000, 07:19 PM   #3
Scooby Newbie
Member#: 433
Join Date: Oct 1999
Location: NV.

The voltage at Idle should jump around,if it's running like .1 to .2 solid at idle it's to lean. At wide open throttle while accelerating it should try to stay around .9 to .94 for a good even fuel burn.
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Old 09-17-2000, 11:10 AM   #4
Scooby Specialist
Member#: 660
Join Date: Dec 1999
Location: Windsor, Ontario CANADA

Is this true? .9s at WOT? every other post I've read says .85 to .87...what gives?
And is it the higher the value...the leaner? or the other way around?
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Old 02-02-2001, 08:20 AM   #5
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Member#: 102
Join Date: Jul 1999
Location: The meeting place

When u mentioned WOT, can you be in neutral or the car must be going to get the reading?
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Old 02-05-2001, 12:18 AM   #6
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Member#: 3983
Join Date: Feb 2001
Location: Sunnyvale,CA
2000 Impreza Rs2.5


Does anybody knows how to setting S-AFC in Impreza RS2.5 year 2000, I am setting S-AFC in Pressure 07 sensor(is it ok?) and I don't know the HI-Thrtl and LO-Thrtl setting,can someone give me some advice?

thanks a lot.....

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