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Old 07-02-2001, 12:07 PM   #1
adam@stonehill.edu
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Default Help!: Autometer A/F Gauge Install

Hello,

Just wanted to know if anyone here has installed an Autometer Air Fuel Ratio gauge in their RS. I have the ECU diagram for a 2000 2.5RS but don't know which ECU wire to tie into. I'm guessing that I want the signal from the front O2 sensor but there are 4 of em?

Anyone know which of the 4 I should use? The pins are:

Front O2 signal 1: B136 Pin 19
Front O2 signal 2: B136 Pin 6
Front O2 signal 3: B136 Pin 7
Front O2 signal 4: B136 Pin 20

Thanks for all of yer help!

- Adam
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Old 07-02-2001, 01:11 PM   #2
adeck
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I just put one it yesterday in my01 rs. b136 #18
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Old 07-02-2001, 01:19 PM   #3
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Old 07-02-2001, 01:35 PM   #4
inpreza kid
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the MY00 uses a wide band o2 sensor for the front one so you have to hook it to the rear sensor. you hook it up to connector b136 wire 18. and i think its a white wire but not sure.
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Old 07-02-2001, 01:43 PM   #5
Safir
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ditto. rear o2 sensor b136 wire 18 'tis white... forced4.com has the pinout for people who are lacking in that area.
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Old 07-02-2001, 01:58 PM   #6
MBX Motorsports
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OK, I'm about to do the same thing here, so let me get this straight. The MY00 you have to use the second O2 sensor, but for MY01 (mine) I can use the first O2 sensor?
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Old 07-02-2001, 02:11 PM   #7
adeck
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MY01 you have to use the second also.
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Old 07-02-2001, 02:19 PM   #8
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someone posted that on the MAF based cars both O2 sensors are narrow band, so that is where you may have gotten the info about the front O2 sensor.
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Old 07-02-2001, 02:32 PM   #9
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the only thing I don't get is...

on the MY00-01 wiring diagram. it says that the voltage range of the fron O2 sensor is 0-1.0 V, which is what the A/F gauge reads. So why couldn't that be the correct one?
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Old 07-02-2001, 04:05 PM   #10
MBX Motorsports
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Ok .. so how accurate can the second O2 be? I mean it's after the cat, so what good is it?
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Old 07-02-2001, 04:09 PM   #11
inpreza kid
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the rear o2 is about +/-10% off. this is just a guess. it reads leaner than it really is. you can't really do any tuning with it. it just gives you a idea.
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Old 07-02-2001, 04:53 PM   #12
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Jgard,

which MY00-MY01 wiring diagram are you looking at? The signal voltage for the front O2 sensor is 0.2-4.9 volts.


Jeff
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Old 07-02-2001, 06:12 PM   #13
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B134. Front oxygen sensor heater... hmm, guess that's wrong, eh?
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