A/F gauge hookup.. - Page 2

Swifty1638 · 04-20-2005

so, that would really make a difference? i grounded it on the chassis, as i figured the ground is a ground..

-A. Swift

LightningGSX · 04-20-2005

In this case, ground is also a 0 volt reference for the gauge.And its not uncommon to see a 1/2 volt or so difference in ground potential between different grounding points in a car.The 02 sensor puts out 0-1 volts relative to the ground potential of whereever its grounded at.So if you ground the gauge somewhere with a different ground potential, you'd have to either add or subtract the voltage drop from the gauge reading.When you're dealing with a rather small 0-1v signal, 1/2 v is a huge inaccuracy.

LightningGSX · 04-20-2005

Ideally, you want to hook it to the same ground the 02 sensor is hooked too, which is right along side the ECU if I remember right

Swifty1638 · 04-20-2005

so, u guys think its the ground, not the power that's hooked wrong?

-A. Swift

LightningGSX · 04-20-2005

Without out looking at it, my guess is, the ground or the gauge is fucked up.I doubt the power has anything to do with it

LightningGSX · 04-20-2005

Did you actually drive it? Your car should run rich when first started

Swifty1638 · 04-20-2005

yep, i've been drivin it for a few days now..that light doesnt flicker or move t all...

-A.Swift

LightningGSX · 04-21-2005

Start by grounding it correctly, at least that will be eliminated as a possible problem.

Second I would verify with a logger or a multimeter that the o2 sensor isn't actually putting out a continuous rich reading.

Swifty1638 · 04-26-2005

Ok. I grounded the A/F gauge to the 106 pin (black with a white stripe), and I also even ran the poewr for it, straight off of the battery. Now, when the car runs, the gauge is off, but when I turn the key off, the gauge turns onto the full rich led (blue) and shuts off with the safc..what's going on? Any other way to run this damn thing?

-A. Swift

**Kracka** · 04-26-2005

Its a piece of shit, throw it away. Seriously, there is no point for that gauge on a turbo car other than having some LED's blinking in your face. OK....enough ranting from me....back to being in a good mood.

LightningGSX · 04-26-2005

Don't run the power straight to the battery, hook the power up to pin 102 or 107.

Do you have the gauges input wire hooked to pin 4? If you do, you must have the wires on the gauge mixed up.

Swifty1638 · 04-26-2005

the wires on the gauge can't be mixed up..they all collect into a plastic plug, that goes into the back of the gauge. Also, when i turn the illumination on for the gauges, the red lean light comes on. I don't even have the illumination hooked up to that gauge, cause it's not needed...

-A. Swift

LightningGSX · 04-26-2005

So,
Gauge power = pin 102 or 107
Gauge ground = pin 101 or 106
Gauge o2 input = pin 4
If thats how you have it hooked up, I'd say the gauge is fucked

Swifty1638 · 04-26-2005

arg..now i gotta pull it all back out, and re-hook up the power...

-A. Swift

LightningGSX · 04-26-2005

Quote:

Originally Posted by Swifty1638

arg..now i gotta pull it all back out, and re-hook up the power...

-A. Swift

I doubt thats your problem

Swifty1638 · 04-26-2005

I now also have the check engine light on. I wonder if I tapped the thing wrong..is the 4th pin as you are facing the plastic plug, or as the wires are nearest you? And, even IF i hooked that up wrong, how could it cause the check engine light to go off, because I connected the wires back..all I did was tap off of some wires..

-A. Swift

LightningGSX · 04-26-2005

Quote:

Originally Posted by Swifty1638

I now also have the check engine light on. I wonder if I tapped the thing wrong..is the 4th pin as you are facing the plastic plug, or as the wires are nearest you? And, even IF i hooked that up wrong, how could it cause the check engine light to go off, because I connected the wires back..all I did was tap off of some wires..

-A. Swift

Its as if you were looking at the back of the plugs

Swifty1638 · 04-26-2005

ok..i MIGHT have screwed that up..lol. I guess I will hafta see..anyway, if that is the case (stupid, stupid me) then would the check engine light shut off by itself, or how can I re-set it?

-A. Swift

Alpine TSi · 04-26-2005

Wow, all this for a worthless set of blinking lights....

**Kracka** · 04-26-2005

Nice title, Swifty

No, it wasn't me, but I know who it was!