A/F Gauge installation

[Santa'sBoostinSleigh]

just got a A/F Gauge now installation time

GAUGE (easy bit):
Black = -ve
Red = +ve
Grey = Sensor

O2 SENSOR (which one goes to the grey on the guage?):
Black = ?
Black = ?
White = ?
Blue = ?


help please!

[Lloyd]

2 black are heater wires, white for earth, blue for signal... I think. Pretty sure thats how I ended up with mine.

This may be helpful to a few people also:
http://home.earthlink.net/~jcgebhart/o2sens.html

[Santa'sBoostinSleigh]

blue gives readings but they no where near are constant
it flaps all over the show!

i found the white ones leading point to the ecu (brown) that gives nothing at all

[Lloyd]

Thats because white is basically a clean earth through the ECU as far as I know. Blue is supposed to flap all over the place, thats how the sensors work. If you stay too high or too low under certain conditions then it throws up a fault code.

It should vary all over the place (going high then low then high etc) once its warm. Probably reads very lean while its cold. Should also read slightly rich at full throttle and stay there until you lift off. At cruise and possibly at idle it'll vary all over the place

[jondee86]

Normal operation will give big variations from lean to rich when
revving the engine. Even at steady throttle there can be small
variations as the ECU adjusts the amount of fuel +/- to try and
achieve the optimum A/F ratio. Big variations at steady throttle
say you have a problem

Cheers.... jondee86

[Santa'sBoostinSleigh]

just went for a cain up the road:

under boost, right round in rich
under engine deceleration (sp?) off the scale in lean (no lights on at all)
normal driving red/orange/green flashing all over the the place

is that right?
its like a freaken disco in my car atm!

[Lloyd]

Thats what it should do. All it basically tells you is if you're running within range when cruising and if its rich when at WOT.