I got a Autometer Air/Fuel gauge for my car. I know they are not the greatest thing in the world but in my mind it is better then nothing. I am going to make a custom mounting plate out of aluminum for the NAV slot. My question is which wire do I hook it to?

 

None, I would take it back and ether invest in a wideband o2 or dyno time with there A/F equipment. Its only a good light show or meter. Just my .02

 

Thanks for the insult!! Do you know it is no good? Do you know anything about tuning? Or are you just spitting out some mindless babble someone else has already said? I just wanted to know what wire to hook up to. I did not need your 2 cents. So here is a dime!! leave me alone.

 

According to the FSM on the Drivers side it's a brown wire or pin 16 from the ECM

On the passenger yellow wire with black stripe or pin 35 on the ECM

be careful about the ECM though. I've found the FSM was wrong on which pin was what for the ignition pulse signal. So your best bet is to find the correct color wire and then do a continuity test to verify which wire is what.

You should probably tap off near the ECM because the shorter the wire, the less load you'll put on the O2 sensor.

 

Thanks jesse once again you show that you have the knowledge and class to answer a question without bashing. Thanks

 

Look I did not mean it the way you took it and yes I do know how to tune I have a EFI UEGO 1000 Wideband O2 Kit on the Z that I use to have on my eclipse turbo. I was just stating that you might be better off buying something better and not making the same mistake I made a long time ago. If you were to go that direction you might want to look into the greddy one. At least it comes with its own o2 sensor. Our sesor is not setup for tuning at wot so you are going to get some funky readings.

 

Well then I eat my words and aplogize for flaming you so quick. I know the downfall of the a/f gauge but I figure it is better than nothing. I dont have the $$ to drop on a wideband setup and I only need it once in a while when I am spraying.

 

We used a extra O2 sensor, as someone said before, it would not read correctly off the stock sensor.

 

Now that is bad news Vandyz. What was it doing off the stock sensor? What is weird is the FSM says there are 4 o2 sensors. Or am I reading that wrong? heated oxygen sensor 1 bank 1, heated oxygen sensor 1 bank 2, heared oxygen sensor 2 bank 1, and heated oxygen sensor 2 bank 2. So is there 4 different ones?

 

JSpec were you the one getting the intake plenum from LSDUnique for testing? How did that turn out? Also, to be relavent, what changes do you think you will notice on your new gauge after installing the new plenum?

 

Yes, there are 4 2 before the cat and 2 after the cat. The 2 after are supposed to measure cat effectiveness by comparing the differences between the 2 in the same pipe.

The info I gave you is for the first 2 before the cats.

 

That’s right we added a 5th bung to the passenger side pre cat area. This allowed two advantages . . . 1) it allowed a great signal from a dedicated O2 sensor and 2) it allows for us to put the wideband O2 sensor in when dyno tuning (instead of clamping it to the exhaust pipe).

 

Yeah, that's what I did too, except, I have a dedicated wideband O2 in my car. Wish I had two, one for each side, but I'm not wealthy unfortunately.

 

You should do what I did. On the off road pipes I add an extra bung for each side. that way when i install the turbo I will be able to switch from one side to another. Just plug the one not using with a 22mm bolt(I think that was the size). The other two were for the regular o2's 4 bung total: 2 for regular o2, one for wideband and the other with bolt for optional switching

 

Yeah, but you gotta jack the car up everytime you want to switch things out. I'm talking realtime as in would like to know what both sides are running at any time. I could theoretically just install 2 wideband sensors and then install an A/B switch, but the problem is you're not supposed to run the engine with the wideband O2 sensor unheated.

 

Using a NB O2 for WOT readings is a waste of time and money.

A gage is only as good as the sensor, and a NB is only accurate at 14.7.

Here is place that has a pretty good WB for a good price.

http://www.innovatemotorsports.com/

Here is a good presentation on why a NB is junk trying to read anything but 14.7.

http://www.fuelairspark.com/common/i...iles/frame.htm

$350 is cheaper than the cost of a new engine and the money spent on a gage and new NB sensor there is only about $250 between the costs.