NismoSR20

Hey everyone, I just picked up some autometer carbon fiber style gauges from a forum member. I bought a Volt and Air/Fuel Ratio gauges. The instructions did not come with the sale.

Was wondering if any one could give me a short detail on wiring the A/F ratio gauge? If it helps, I have 3 wires coming from the O2 sensor if that helps.

Do I have to cut all 3 O2 wires and test one at a time?
Is there an easier way or trick I can do instead?

Any info would be greatly appreciated! I'm tired, and have searched long enough, I just want these in already.

Thanks!

-Ryan-

P.S-I own a 1991 NX2K

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-Ryan-
'91 Hardtop NX2000-SR20VE- SOLD

SuperblkStalion

OMG these are the easiest to wire up. do a search please.

NismoSR20

I've gone on the autometer website and have searched there as well as here. Plus (like me) most of my friends are wiring noobs.

-Ryan-

cause4alarm

splice into the wire at the ecu....



that image was stolen from charlie2020's afc thread



this was stolen from a post by NICK in the library


either way look for pin 19, tap into it and rock out with your cool new disco light

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B14 Se-Rious

that a/f gauge is pointless, throw it in the garbage.

NismoSR20

How so? Is there something wrong with this gauge? Ive heard some very good reviews.....

Opinions and info would be great

-Ryan-

B14 Se-Rious

cause its not a wideband o2... the information that its going to give you is useless.

t bags

tap the cig lighter for the volts

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2002 quest gxe--pimp wagon

NismoSR20

Shweeet man thanks!

Two down, One down....do I splice the purple wire into the O2 sensor? Or in the ECU...because I heard that the reading is as strong from the ECU.

Thanks again

-Ryan-

scortch99th

either or for the AF .. i did it to my o2 sensor in my rice days cause it was easier than finding the right one on the ecu....

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91 classic SE-R (sold)
94 classic LE (falling apart beater)
91 240sx(rps13) (sold)
95 P10 Primera (current daily)
COMPRESSED CLIQ

NismoSR20

So I just have to test all three wires comin off the O2 sensor to see what one is the signal.

scortch99th

well on my nissan one it was the white wire




or was it the red, i think it was the white.

chriscar

Well that settles it. It's definitely white.









Or red.

C

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cogito ergo zoom................
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JKho

Hi Ryan,

It's not there is anything wrong with your particular gauge, it's all the gauges like yours. These type of gauges don't give you any real useful information. A wideband O2 will give you readings b/t 0 and 5 V. Most will give readings b/t 0 and 1V.

Because the a/f gauge only gives you blinking lights, it doesn't give any numbers as to what is your actual a/f ratio.

cause4alarm

it would be pretty retarded to tap it at the sensor, why have a long ass wire hangin out in your engine bay and then have to put it through your firewall. i would be much cleaner to do it at the ecu, i suggust dissconecting the harness from the ecu, taking the backing piece off of the harness so you can see where each wire comes from, tap into it however you chose put the cover thing back on and your splice is invisible. clean then you only have to have a few feet of wire going to wherever you have the disco light.


does the cig lighter work when the car is off, or is it an igniton signal? check before using it, i have my gauges taped into the radio power.

for any other gauges with back lights you can wire them to the dimmer... they have to ground to the dimmer also though

NismoSR20

Ahhhh, thanks for the info Jason!

I kept hearing the term wideband O2 and didnt really know much about it.

So looks like I'm tapping through the ECU...I like the cleaner look. But I did hear the signal isnt as strong, could anyone confirm this?

-Ryan-

B14 Se-Rious

The signal is the same.

NismoSR20

Alrighty, thanks for the clarification!

-Ryan-

santana3388

bummpp this thread is exact info i need