U12 / GTiR Oxygen sensor question

chriscar · 02-05-2007, 02:39 PM

I'm doing some work on a forum members' B13 running a BlueBird engine, U12 ecu, and skinny oxy sensor.

It seems that the skinny sensors put out a much different signal than the fat ones, and the various Consult-like apps don't read it correctly.

Running NissanDataScan software, on a cold car, at idle, the o2 reading starts high, and falls to 0 as it heats up. When driving the car on the road, it'll jump radically up to 100 and back to 0.

All the US spec & JWT OBD1 B13's I've worked on with the fat o2 sensors will have a much smoother variation in output. I had this same issue on a GTiR ecu'd B13 over the summer.

So does anyone know how to check for proper operation of a skinny sensor? Also, it'd be a good idea for these Consult programs to have a setting to switch between the two types of sensor.

C

wallerio · 02-06-2007, 11:59 AM

different type of sensor.
I think you have to use the right sensor for the ecu.

If I remember correct, some sensors was measured for resistance but were very slow...(oldschool sh**)

chriscar · 02-06-2007, 12:08 PM

It's the skinny sensor, and as far as I know, it came with the motor and ecu as a package. As I said, I had the same experience on another car running an Avenir engine, skinny sensor and GTiR ecu.

I think the issue here is that the skinny sensors have a different afr-to-voltage profile than the fat sensors and the 3rd party Consult programs don't read the sensor correctly.

C