Which ecu wire for autometer air/fuel signal? anybody knows for sure?

 

are you running this off the stock narrowband O2 sensor?? if so you are sorta wasting your time as you will not get accurate readings and the gauge will just be jumping around all over the place.

anyway the primary O2 sensor wire is pin C16 (I think its white)

 

thanks.. i know its somewhat useless.. but its still better than nothing. it will tell me if i'm running lean

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtec.dc2 &raquo;</TD></TR><TR><TD CLASS="quote">thanks.. i know its somewhat useless.. but its still better than nothing. it will tell me if i'm running lean</TD></TR></TABLE>

not really. the narrowband O2 is only "accurate" near stoich (14.7). anytime the a/f ratio is not close to stoich, you will just see the gauge jump all over the place. even at idle, when the a/f ratio is relatively steady, the gauge will be jumping around all over the place.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtec.dc2 &raquo;</TD></TR><TR><TD CLASS="quote"> it will tell me if i'm running lean</TD></TR></TABLE>

Oh will you now...? I feel ripped off then for buying a wideband then.


Modified by neo_ at 3:24 PM 12/2/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by neo_ &raquo;</TD></TR><TR><TD CLASS="quote">Oh will you now...? I feel ripped off then for buying a wideband then.</TD></TR></TABLE>

A "wideband" O2 sensor is what he name implies, and not like the stock O2 sensor (in most cars) that just pretty much tells if you're rich or lean (below or above) the stochiometric (14.7:1) a/f ratio.

I'll be installing the AEM wideband in the new car after I have another O2 bung welded into place (before the cat).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zygspeed &raquo;</TD></TR><TR><TD CLASS="quote">

A "wideband" O2 sensor is what he name implies, and not like the stock O2 sensor (in most cars) that just pretty much tells if you're rich or lean (below or above) the stochiometric (14.7:1) a/f ratio.
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Your sarcasm detector failed

 

Oh, I see ... said the blind man.

 

oh come on guys! the lights are pretty!! &lt;--- sarcasm

 

I have the dancing light show. Most the time I just unplug it due to it's ability to **** me off.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by neo_ &raquo;</TD></TR><TR><TD CLASS="quote">

Oh will you now...? I feel ripped off then for buying a wideband then.


Modified by neo_ at 3:24 PM 12/2/2006</TD></TR></TABLE>


already explained by zyg, narroband will tell you if you're running lean. and thats better than nothing. i never stated to choose it instead of wideband, only what its good for.. and its more than a lightshow.

using wideband all the time + making lots of hp gonna end up with worn out sensor, so unless you replace your sensor often enough you won't get accurate readings.

wideband is ideal for tuning, if you feel the need to drive with it all the time, be my guest, if you want some type of way to tell if you're running lean, if you're running in closed loop or below closed loop, then tap into your factory volt signal with autometer gauge, its cheap and allows you to gather more information about your car

 

how is it going to tell you if you are lean? have you ever seen a a/f gauge hooked up on the stock O2 sensor? you can be rich, say 8000RPM wide open throttle, where you KNOW the ITR is very rich on the stock ECU, and the a/f gauge will still be jumping back and forth from rich to lean to rich to lean. the same is true if you are just cruising, barely on the throttle down the highway, where you KNOW the stock ECU is lean (for fuel economy) and the gauge is still going to be jumping back and forth between lean and rich and lean and rich, etc. I dont see how using an a/f gauge on a stock narrowband O2 sensor is going to help you one bit. when the gauge shows rich, or lean, its just telling you that it doesnt know what its seeing because it only "accurately reads" a very small window around 14.7:1 on the narrowband sensor. I guess youll find out the hard way when you get it hooked up and you will see what we are talking about.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RTW DC2R &raquo;</TD></TR><TR><TD CLASS="quote"> have you ever seen a a/f gauge hooked up on the stock O2 sensor? </TD></TR></TABLE>

yes i have.. i've had it for the couple years hooked up to stock wire. and it never showed lean when i was at full throttle... i'm not saying you are wrong, but in my experience, it corresponed very well, when i'm cruising in closed loop, it would jump from side to side.. as soon as i apply throttle it would go towards rich, never lean. as soon as i let of the gas it would go towards lean. thats just from experience, i don't know enough details on how it works so i won't comment until i find out.

 

ok.. heres why it would show lean. lets say it needs to read .5 volt to show 14.7 a/f.. anything below .5 volt would be rich and anything above .5 volts would be lean. so i do'nt see how it would read signal above .5 volts and show it as rich..

heres some tech information about 4 wire sensors: http://express-press-release.c...).php

correct me if i'm wrong.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtec.dc2 &raquo;</TD></TR><TR><TD CLASS="quote">already explained by zyg, narroband will tell you if you're running lean. </TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zygspeed &raquo;</TD></TR><TR><TD CLASS="quote">A "wideband" O2 sensor is what he name implies, and not like the stock O2 sensor (in most cars) that just pretty much tells if you're rich or lean (below or above) the stochiometric (14.7:1) a/f ratio.
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