Alright guys I just bought a A/f Gauge for my 92 maxima se and it says to run the signal wire to the signal wire from my o2 sensor. For some reason that doest seem to work can you tell me which wires you guys are hooking it up to? Thank you very much.

Steve

 

ummmm
gimme a minute

 

 

Is this the schematic of the wires on the clip to the ecu?

 

yeah, that's right on the ecu.

 

looks like it to me.

 

Thanks Guys.

 

yep and "w" means white.

IIRC its the top row and its on the side of the bolt closer to the firewall, but please double check before you tap.

 

Have you guys installed one yet? how does it act? and does is take long to start reading?

 

I posted a thread with a video awhile ago, it starts reading as soon as its hooked up.

how does it act? keeps the passangers entertained

 

And here I was gonna run MY wire all the way out to the O2 sensor itself...

 

i still have to hook mine up. but don't know if its the same wire for the GXE model??? can u guys help me out on that??? i have the autometer indiglo a/f gauge btw.

thanks,
rick

 

http://forums.maxima.org/showthread.php?t=270708

video thread

 

i'll try to get a picture of mine. I've got a few wires tapped because of other mods (VTC's, Variable Intake, etc)

 

They should start working immediately. Although they will act different from cold start to a fully warmed O2 sensor. That only takes a minute or so.

It should osillate between lean and rich at idle and when cruising. This is closed loop operation. Your watching the ECU trying to keep the engine in stoich combustion. If you have one of those silly round 10 led meters then you'll get VERY little useful info during closed loop operation.

When you mash your foot to the floor you enter open loop. This is what the meter is really designed to monitor. Hopefully it will not go red (lean) at all, but stay in the middle rising to the high middle. If it goes too rich your losing power. Too lean and BOOM!

But you can't really use these things to tune your engine. The problem is that the everyday O2 sensor isn't very accurate or fast. You really need to get a calibrated lambda O2 sensor and they are VERY pricey. But you really only need that if your looking for that every nth degree of advantage. But then youd also probably be running EGT meters too.

Overall, 10 digit Air/Fuel meters are a very imprecise view of a very imprecise measuring device. They are useful for trending analysis of your engine. If it always lights one way and then one day starts doing something different you know something is wrong. Or if it gradually starts displaying differently something is working different.

As far as my reference to 10 digit devices, I have a Halmeter which uses 30 leds and is MUCH easier to see what is going on. It wasn't much more then the 10 digit units though it is bigger.

 

ok but i still want to know if its the same wire for the GXE model??? cuz the schematic that was posted by MrGone is probably for an SE and i have a GXE and all i want to know if its the same wire or if its different???

 

pretty sure its the same wire for the GXE...I had one in mine and I specifically remember tapping the white wire

 

thanks da-max

 

i double check for you, GRNMAXDMON

 

GRNMAXDMON

according to the FSM, you are going to need to tap wire #29

 

damn back in the day I wonder if mine was even on the right wire then...I was probably getting AF readings from the ignition and what not

 

if it helps any #29 is right below #39 and is white aswell


Besides I betcha you got the right wire Addae... on the VG #39 is a green/red wire that goes to the EGR Temp Probe

 

thanks MrGone now i can finally install this damn thing.

 

I have a 90 VG SE need to hook up gauge, don't wan't to tap ECU, down at the o2 sensor theres a white, green, black wire which do I need to tap.

 

white.

10chars

 

is that on the sensor side of the connector or the motor?
I have a bosch sensor, they have diffent color wires.

 

wiring harness side (ie. oem). Just trace the wire.

It really is easier and better to do it from inside the car though, it's protected from the elements, and since it uses small differences in voltage to get a reading, you really dont want corrosion to start forming on the wires.

 

I tapped into # 39 and still no read out, just black no leds lite up, without the signal wire hooked the last green led is lite up. this sucks.

 

Puna, your a VG, you need to tap wire 29.

 

Attention ALL VG OWNERS TAP INTO #29 WHITE, its the only way to do it, you can't tap in at the sensor it simply won't work.Thankx MRGONE for all the help.

 

does any one have pics of where to tap it becase i dont know which on i taped it to so if someone can please post pics it will be really great

thanx
william

 

Are you a VG

 

take off the drivers side ecu kick panel and tape the wires there

 

yea im a vg

 

well i wired mine up wrong i tapped into the TPS signal wire and how do we read this schematic what side is the wires coming out of