Need help for air/fuel ratio

[stephearak]

I have just buy a air/fuel ratio for my M100 but I don't found the lambda sond to connect it. Somebody can explainme how can I do (with pictures if possible). Thanks a lot

[Ashaman]

Are you sure your car is equipped with one? If so, it should be right there on the turbo as soon as you open the hood!

The stock unit is narrowband anyway, it isn't really of much use for tuning purposes.

[Aurora40]

Standard disclaimer, I've no Elan and only think I know something.

However, if you bought an aftermarket type of wideband O2 sensor, you will need to have a hole cut and a bung welded to your exhaust pipe. Then that's where you can put the air/fuel sensor.

I don't know what a good location is, but the same place the factory put one for the narrowband sensor might be a good spot?

[Ashaman]

Unfortunately the stock location is immediately after the turbo and is too close for a wideband.

You need to be like 14-16" downstream at least if I remember correctly.

[Houdini]

My wideband directions say 12-48 inches downstream but before the CAT.