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Old February 25th, 2015, 04:10 AM   #1
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help on what Wire to Tap for A/F (air fuel) Gauge

so after hours of reading, looks like a narrow-band Air Fuel Gauge isn't so bad:

The Oz sensors after the precats--sensor 2 of banks 1 and 2--are narrow-band. If you just want to monitor AFR, you can use the typical narrow-band guages like Autometer's. This should give you a reliable AFR indication. With the widebands making the primary AFR adjustments, I'm guessing that the readings from the narrow-bands' AFR guages will read rock steady most of the time, instead of the typical rich/lean cycling light show on the "older" engines. As far as installation, just follow the directions with the gauges. They are fairly simple and straightforward. My advice is to tap into the input wires to the PCM. That way, you stay out of the engine bay completely.

http://www.v6performance.net/forums/...uel-gauge.html


if this information is accurate or if someone can please give me some info about what wire to tap, it would be greatly appreciated


P.S. only DIY i could find is for 6th gen.

DIY - Air/Fuel Ratio Gauge Install
https://www.google.com/url?sa=t&rct=...86956481,d.cWc
http://www.v6performance.net/forums/...e-install.html
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Old February 25th, 2015, 10:48 PM   #2
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Interest in this too. I can't even figure out which one connected to the o2 is the actual voltage read out.

otherwise anyone knowing which lead on the ecu reads out would be helpful.
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Old February 26th, 2015, 01:40 AM   #3
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after some more researching, looks like for the Manual or 6spd specifically, its the White/Green wire?




looks like it may be different for different models and transmissions or is it that wire?


any help appreciated
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Old February 26th, 2015, 09:33 PM   #4
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That's the heater coil, that won't do much.

Although thanks for finding me the pin on the ecu to adjust the alternator voltage output.
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Old February 28th, 2015, 06:06 AM   #5
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Quote:
Originally Posted by oraclem19 View Post
That's the heater coil, that won't do much.

Although thanks for finding me the pin on the ecu to adjust the alternator voltage output.
oh snap....let me read through my Haynes and see if i can find it


hope Kschwiggy mind or have to repost this info:

When I had the AF gauge i had a dedicated AFR sensor installed in the J pipe, so the only wire I tapped was power under the dash. The stock A/F sensors do not refresh very often, I believe.
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Old March 7th, 2015, 05:50 AM   #6
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anyone have any ideas much appreciated
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Old March 14th, 2015, 08:33 PM   #7
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Vaccum Gauge installed but it idles around 15 at highest

tried installing on Intake to Throttle Body tubing, didn't work out

ones i've seen idle much higher...anyone with more info on where to connect for more accurate numbers?


MOV04427 - 3-13-15 - vacuum gauge.mp4 Video by GR3Y5H3ART | Photobucket
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Old April 21st, 2015, 07:46 AM   #8
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just get a wideband, no useful data from an a/f gauge
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Old April 23rd, 2015, 12:08 AM   #9
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finally got it done and posted pics for anyone else looking to do this:


HOW TO: Install A/F Air Fuel Gauge and/or Tach RPM Speedo Gauge
http://www.v6performance.net/forums/...r-fuel-gauge-t
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