Mike94ZLT1

iTrader: (3)

my car is running super rich. Last night I ran the wires for my air fuel gauges, and tapped into the purple wire on my harness extensions. To see if the gauges worked, I wrapped the wires to the gauge, connected the power and ground, and turned the car on. The gauges pegged all the way lean, and stayed that way. I figured maybe it was because the car was cold. So i removed the gauges. Then this morning I drove around, came home, connected the wires and started the car. Same thing, pegged all the way to rich. Now my car does stink of gas when its idling, but I thought that was because of the cam and not having cats. What should I do?

Turo

iTrader: (23)

when did you read the gauge? my autometer only reads accurately at wot, any other time it just dances around and puts on a light show.

DONAIMIAN

iTrader: (18)

If your not at WOT then ignore that gauge. Its just a light show till you lay into the pedal.

Ferocity02

iTrader: (60)

The gauge's actions are completely random and unpredictable. They are very precise and sensitve and the slightest change in A/F will throw it back and forth. At idle and cruising, the gauge should bounce back and forth. This is due to the PCM trying to maintain a perfect 14.7:1 A/F ratio. If it goes to lean, it adds more fuel, and vice versa. It over-corrects itself which causes it to bounce back and forth. A/F gauges only provide qualitative readings, meaning you cannot get any solid numbers from them. They can only be used to see changes in A/F as a result of mods, engine problems, and other things. After tuning, I know that my gauge, at full throttle, should have two green and one yellow light. If that changes, then I know something is wrong or something has been changed.

Hope this clears it up

Mike94ZLT1

iTrader: (3)

yes but its not a light show at idle. All the lights light up, and stay lit. I had it temporarily wired into the car, it was sitting under the hood I didnt play with the throttle at all.

Turo

iTrader: (23)

forget what it reads at idle, only look at it under WOT. that gauge is completely useless at idle.

Ferocity02

iTrader: (60)

If all the lights light up then it may be a faulty gauge or bad install

DONAIMIAN

iTrader: (18)

How did you wire it up, did you buy the harnes so you could wire it directly with the O2 sensor or what.

Mike94ZLT1

iTrader: (3)

I tapped into the 02 extension I got from thunder racing. I did use wire thicker than the harness wire too, would that affect it? What should I tap into? Thanks for the help guys.

cz2898

An air/fuel gauge is a $100-$200 light show depending on what kind of gauge you bought.

Ferocity02

iTrader: (60)

Mine was only about $50... And is useful at full throttle.... thats about it

66ImpalaLT1

If you want useful readings, get a wideband.