a/f gauge

tried to hook up a/f gauge tonight i hooked up the sensor then i tapped the pos through the volt gauge and neg through the volt gauge when I turn it on only one led lights up at one end where did i go wrong? please help need it done before work tommorrow

Chad

3 wires -

12v +
Ground ( you need a good ground, preferbably where your ecu grounds)
tap the wire for your 02 sensor, i believe you guys have what is called a heated 02 sensor which means it takes a while to warm up and then the readings will start to show. with just the power on and the car not turned on only one led will light up.

I had the car running for just a second and one led read far rich. does it just have to warm up to read stoich?

-thank you for your help
Chad

you have to let the o2 sensor warm up. It usually takes about 5 min while driving before it starts to work. so if you have it tapped into the o2 sensor and power and ground then go and drive it....it should start to work after it warms up. ( i had the same prob with mine)

I agree with Travis. You've most likely installed it correctly. The car will run rich on startup, but once it's warmed up the gauge should read normal.