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Installing Air Fuel Ratio Gauge

mr_crust

By mr_crust,
in Engines & Forced Induction

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mr_crust Experienced

mr_crust

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Posted

evening all,

today i just finished of a custom bracket holder for my gauges (ill post pics soon), so ive relocated my boost gauge and installed an autometre air/fuel ratio gauge. Now both gauges have all lights working, but 1 only have one wire which im not sure on connecting..which wire do i splice into on the oxygen sensor to get the readings.

its an r33 gtst, and the oxygen sensor has 1x black wire and 2x white wires...ive narrowed it down to the 2 white wires but which one ? if any could help it would me much appreciated, i just dont wanna have to wait a week to get it done by a mate.

cheers

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mr_crust Experienced

mr_crust

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its there simply for the wank factor of having gauges lined up, and theres no point having it sitting there and not working , so i wanna wire it up.

ive just had a look at the wiring diagrams and there two white ones look like heater wires and the single wire (being black) must be the signal wire.

i'll wire them up tonight then and post up the pics :)

RBwhatever Veteran

RBwhatever

Posted
Posted

As far as it reading your afr's they really are quite slow, due to the narrow band sensor. The only useful things I found it good for is reading afr's on a constant throttle position eg. WOT, cruising, part constant throttle. And it will tell you if your O2 sensor dies.

Mine died, I wouldn't have known if it wasn't for the afr gauge giving me some really wacked out figures.

Replaced the O2 sensor and made a world of difference to how the car ran.

mr_crust Experienced

mr_crust

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well the way i see it , is if the sensor dies i will at least know..better then ahving a monster tacho when i already have a normal tacho or an oil presure gauge when i have one on the dash..but then again i have a bosot gauge and one on the dash hehe.

  • 1 month later...
mr_crust Experienced

mr_crust

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Here are some crappy pics i took, but im sure u get the idea on the bracket i made up, and its all under the dash lines making it legal!!!

also it mounts under the dash surround and screws into the same screws as the climate control and head unit, so it comes in and out within minutes

post-16268-1180958164_thumb.jpg

post-16268-1180958177_thumb.jpg

post-16268-1180958200_thumb.jpg

mr_crust Experienced

mr_crust

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  • Author
Posted

the setup isnt for the wank factor, its to stops defects and cops saying that its illegal to have them on the a piller or above the dash lines.

visablity is 100% , with the autometer gauges u can move the bracket up and down, so gauges are on an angle to face the driver..ill take a pic late today from the drivers seat to show what its like

Beer Baron Grand Master

Beer Baron

Posted
Posted
well the way i see it , is if the sensor dies i will at least know..better then ahving a monster tacho when i already have a normal tacho or an oil presure gauge when i have one on the dash..but then again i have a bosot gauge and one on the dash hehe.

actually a monster tacho has more purpose than this afr gauge. on drag cars etc you need a very resposive tacho and shift light, and peak hold is needed too.

and oil pressure gauge is FAR more usefull than either of the above. the factory gauge is purposely built to be ridiculously slow (so as not to alarm drivers) and it's accuracy is also questionable. an aftermarket one offers faster response, accurate readings and memory function all of which could save your engine.

the only thing a narrow band AFR gauge will save you is carrying around the hundred bucks you would have had, had you not bought a useless gauge...

Beer Baron Grand Master

Beer Baron

Posted
Posted

no offence mate, but how the hell do you tune a fuel pressure gauge with a narrow band o2 sensor and gauge? a fuel pressure gauge sets fuel pressure and hence itself is set-up with a fuel pressure gauge (funny that). as for tuning your safc with it. lol. i'd like to see that.

mr_crust Experienced

mr_crust

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  • Author
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i can see where the blokes coming from because if your doing a home tune u can use the a/f gauge to see how lean/rich the cars running and adjust the safc accordingly.

anywho i have no real reason for having the gauge for any legit purpose apart from the cool factor of gauges hehehe

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