I'm not sure if this is the right section, but it seemed to be my best option.

I'm getting ready to put an a/f gauge in my 94 Prelude, and was curious about how I should run the wire to get from inside the car (the gauge of course) to outside and underneath to my o2 sensor? I know I've got a power wire and a ground wire to hook up but where does the sensor wire go? Thanks guys

 

The best place to get the signal from is at the ECU itself. You will not have to run any wires into the engine bay whatsoever and you won't have to worry about getting under the car. Get an ECU pin out for your car and that should show you exactly where the primary 02 signal wire is.

You know your gauge is only going to be as accurate as your sensor? Which is only from ~14.3-15.1 AFR... Otherwise it's just a fancy light show.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White Smoke &raquo;</TD></TR><TR><TD CLASS="quote">You know your gauge is only going to be as accurate as your sensor? Which is only from ~14.3-15.1 AFR... Otherwise it's just a fancy light show.</TD></TR></TABLE>

True that... If you're concerned about AFR's, get a wideband.

 

Thanks for the insight guys. I've heard alot of good things about Innovate's LC-1 stuff, should I go with that?
http://www.powertraincontrolso...id=40

Does this mean my gauge is useless (if I get a wideband vs. the stock narrowband)?
It's an Autometer Sport-Comp gauge, looks like this:

 

That gauge is pretty much useless... It's really inaccurate. If you're just looking for some "bling", then by all means, run it.

However, if you're looking for something to monitor the actual air/fuel ratio, get a wideband. The Innovate one is good. Lots of people run them. However, the link you posted is just the controller. No gauge is included.

I myself run the PLX unit: http://www.plxdevices.com/products/dm5/afrsmcombo/. Gives you the light show () and the actual A/F ratiofront & center.

 

Thanks for the help man, much appreciated.

 

The gauge is actually very accurate for what it is, and that is a volt meter. You can run the LC-1 in conjunction with your autometer gauge with very accurate readings. With the LC1 software you can calibrate the controller with your gauge if it is off at all. Innovate stuff is very easy to use, I run the LC'1 along with the AEM in my car. I also have the LM1 I use to check my sensors and tune other cars.

 

So I can still run the Innovate setup with that gauge, the only thing I wont have is the digital display of my a/f ratio (the actual number) correct?

 

Correct

 

Cool, thanks man.

One more dumb question (and this is starting to turn into a tech thread instead of a "how to wire it" thread... ) but will my tuner know what the specific afr is somehow, or is that very necessary? (I'm working on a budget boost build, it's going to be tuned either with Crome or preferrably eCtune).

 

If you're running a wideband o2 sensor, don't most tuning programs (crome, neptune, Hondata) have a spot on the screen for A/F ratio?

I think I remember a spot on my Hondalogger screen for A/F ratio, but since I was only running the stock o2 sensor at the time, nothing showed up on the screen. Hence the reason why he unscrewed the stock o2 sensor & plugged in his own PLX gauge.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ECX &raquo;</TD></TR><TR><TD CLASS="quote">One more dumb question (and this is starting to turn into a tech thread instead of a "how to wire it" thread... ) but will my tuner know what the specific afr is somehow, or is that very necessary? (I'm working on a budget boost build, it's going to be tuned either with Crome or preferrably eCtune).
</TD></TR></TABLE>

Yeah, he should know... You are gonna need to run the narrowband output of the WB (which is also going to your A/F gauge) to the stock 02 sensor input on your ECU for data logging.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C_EJ8 &raquo;</TD></TR><TR><TD CLASS="quote">Hence the reason why he unscrewed the stock o2 sensor & plugged in his own PLX gauge. </TD></TR></TABLE>

So (dumb question) you can tune with a wideband but switch back to your narrowband o2 afterwords and it still work?

 

Yes, you should really talk to your tuner about all this as he is the one who sets up weather you run any closed loop or not.

 

Ahhh I've got so much more to learn.

Thanks for the help man.