zero2005

alright, so i pulled 2 NB o2 sensors out of my old H-pipe before i put the turbo on, kept them in the junk drawer just in case. im gunna use them for the megasquirt temporarily until i can get a wideband.

plan on cutting the connector off and using a 4-pin molex (like on a computer) but the wiring is kinda odd. its got 2 black wires, a white wire, and a blue wire. i've read conflicting things about wiring on it.

i'm assuming that the 2 black wires are the heater wires... but i cant find any definitive answers?

cliffyk

First they are not OEM sensors, and the black wires are definitely the heater wires. The blue wire is the signal+, the white the signal-. I think they might be NTK???

zero2005

ah sweet.
looking at it now, its really faded out, but it says Denso.

there was alot of conflicting info on the web on what wire was what. thanks for clearing that up. wiring it now. all thats left is getting the sensors wired up and setting up the fuse block. i'm trying to figure out a way i can share some of the sensor info so i can retain partial EEC-V control for things like Tach/Speed gauges, for now fuel pump control (until i go dual-pump sumped tank return) and Cruise control.

cliffyk

The O2 sensors have nothing to do with anything but fueling, and then only in closed loop operation--there are DTC code "switches" in the EECV tune that will let you turn the sensor monitoring off, and should block any MIL trigger from the "eek-5"...

zero2005

ah yea, more specifically i mean other sensors like CLT, IAT, MAF, VR crankshaft sensor, etc, so i can retain the functions i need without getting too complicated of a wire mess.