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How Do I Install Afr Gauge On R33

03osh

By 03osh,
in R Series (R30, R31, R32, R33, R34)

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r33cruiser Grand Master

r33cruiser

Posted
Posted

I forget exactly which wire i hooked mine thru, i think it was white.

Just hook up the + and G to the gauge, and run a piece of wire to the o2 sensor, strip a tiny bit off and test them all.

Easier way is to download a ECU pinout, and hook it up to the O2 sensor wire.

Took me 5min.

mad082 Grand Master

mad082

Posted
Posted

the easiest way to check is with a multimeter. if you can wedge it into the plug where the wires go in while the car is running (from memory) you should see that 1 gives a 12v reading, 1 is an earth (so no reading) and the other fluctuates. that is the one you want to tap into.

i should just add, that if you think that the gauge is going to tell you your actual air/fuel ratios accurately, it won't. basically it will tell you if your o2 sensor is working properly, but other than that it will be of no use to working out if you car is running lean or rich at full throttle as it will say rich whether your AFRs are 10: or 12:1. they are designed to work with a narrow band o2 sensor (which is what the stock one is) and won't work the same as a wideband. that said i have one in my car because i like flashy lights, lol

mad082 Grand Master

mad082

Posted
Posted
What's the point of an AFR gauge?

I'm not trying to be smart, just genuinely interested.

Thanks.

the ones that go to the stock o2 sensor: to see if your o2 sensor is functioning properly, and to look pretty. you can also use it to drive more economically.

wideband setup: for tuning purposes

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
What's the point of an AFR gauge?

I'm not trying to be smart, just genuinely interested.

Thanks.

The Autobarn ones - there is no point. Those are the ones that wire into the O2 sensor or similar.

They are utterly useless and do not give any useful information.

aut7175.jpg

The only way is with a proper wideband sensor to output meaningful data to a ECU/Laptop etc for logging.

Would look similar to below

These type could be hooked upto a PROPER gauge, or ECU/laptop pinouts etc

wideband1.jpg

I suspect that this thread is about the first type however... Because if you knew about the second one, you wouldn't be asking how to install it :D

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