mxquattro

OK one more question. I want to put an air/fuel meter on the car, and I see 3 wires on my o2 sensor. I just need this temporarily for testing, then it goes. Which of the 3 wires do I put the meter on? One is 12V for the O2 heater, but Im not sure which of the other 2 wires I should put it on.
thanks!

Rs1

iTrader: (1)

You'll need a wide band probe to get a decent reading. The afr meter should only need a live,earth and 1 signal. Are 2 of the wires the same colour,or is it 3 different colours? What colours are they?

mxquattro

Pretty sure the sender I have in there now is not a wide band, but not positive. Its OE. the colors black/green, brown/white and black.

Jo

On a T34 Escort Cossie you have a black, white and red wire. Signal wire is the black one
hope this helps

GAZ345

i dont think you can just tap into the ford lambda sensor,as it runs less than 12v & will not power your a/fuel meter, you will need to put another sensor on your down pipe, one off a mondeo or something, if it has 4 wires black grey & 2 white it will have a heater in it, these are the best type