EFI O2 Sensor Location

[HighwayThunder]

The easiest place to attach the O2 sensor would be the exhaust pipe H crossover. Is there any reason why that would not be OK?

Thanks.

Cheers,
Richard

[simplyconnected]

You want the O₂ Sensor in the hottest portion of your exhaust pipe. The hotter the better. To test for voltage, I use a propane torch. - Dave

[stubbie]

Optimum placement I believe is no more than 2 foot from the manifold.

[OX1]

Is it a wideband? If so, you can reduce life if it is too close. 12-18" after manifold or header collector is usually the best compromise between accuracy and service life. Also make sure it is pointing at 10 or 2 O'clock, on the pipe. If it is pointing downward, it will get condensation in it and kill it quick.

[Dark Soul]

All modern EFI systems use a wideband O2 sensor. The kit manufacturer should tell you the distance from the header. Mine is a FAST unit and I mounted it about 4" behind the transmission crossmember, in front of the parking brake lever, on the passenger side exhaust. I have a custom exhaust so yours may be different.

Make sure to have the sensor mounted north of the 9:00 O'Clock position so condensation doesn't collect in the sensor tip.