Unsupa

iTrader: (2)

car: 84 SE

so i got myself an air/fuel gauge for 5 bucks, couldn't beat the price.. so i hooked it up according to the instructions, and it works at idle just fine.. but after going through the gears and deaccelerating, once i get going again it starts bouncing from ideal/rich to super lean... but if i let off and let it idle, it reads fine.. could the o2 sensor have anything to do with it? it's a bosch universal.. and the gauge is a sunpro.. thanks.

-UsD

Unsupa

iTrader: (2)

nobody?

jayroc

That is normal. You got it hooked into your harness with your ECU, right?

RotorMotorDriver

iTrader: (1)

Yeah, theyre notorious for not working worth a damn. Thats why everyone who cares usues a wide band O2 sensor and meter.

~T.J.

jayroc

Actually, I had one on my Z for awhile. I thought I hooked it up wrong too, but it is written in the directions someplace. You need a seperate o2 sensor, or some kind of OP amp circuit if you want it "proper", otherwise your ECU "takes over" the signal. I don't know the electronics exactly, but the ECU is causing it.
Someone told me that it is the ECU constantly trying to adjust the mixture..

Directfreak

iTrader: (2)

It's normal if you're getting the signal from the ECU.

It's known as the "closed loop" of the ECU trying to maintain best fuel economy.

Don't worry about it - as long it's on the "green" side when your're at WOT, then you're good to go.