4 wire O2 sensor conversion

[carotman]

I was reading this article on www.ludespeed.com

http://www.ludespeed.com/products/prelude/how_to/oxy/index.html

The Prelude uses 2 O2 sensors just like our Accords do (88-89 EFI)

The guy replaced both sensors with a single 4 sire one and it seems to have worked.

Anyone attempted this?


I'm doing the B20A swap and the JDM exhaust manifold only uses 1 O2 sensor. I planned to drill another hole to install a second sensor but it looks like this is going to save me some bucks and time.

Any thoughts?

[Mike's89AccordLX]

I was told from Autometer that I should buy their $120 O2 sensor conversion from a 1 wire to a 4 wire. He said it was more accurate. It sure sounds like it would work though.

[A20A1]

well part of it is the preheater right?

[carotman]

yup 2 wires are for th pre-heater.
1 is the sensor signal, the other is the ground.

My main concern was to hook-up the 2 wires from our O2 sensors to only 1 on the 4 wire system.

[anchovies]

Didn't sean talk about this long long time ago.

[2old_honda]

does anyone know how much current the heated part draws?

[carotman]

Yeah sean mentioned that back when the board was hosted on EZ-Board..

I always thought I would need 2 O2 sensors, but if I can use the B20A exhaust manifold without drilling or modding anything, I would prefer to go that route. It might even be ok in the stock location.