So we are good there. And I don't think it is getting power elsewhere.
Actually couldn't there be a open short or power shorting to a ground maybe???
So we are good there. And I don't think it is getting power elsewhere.
o2 heater wire is only going to the relay on pin 87a.
Although the heater is on all the time the o2 voltage should be switching low to high.
The voltage slowly decreases as it worms up but never gets below 4v or so.
It doesn't go rich/lean either. Stays on lean all the time but runs very rich.
This is all at idle.
If your sensor never sees a rich condition then there could be an exhaust leak, any cracks in the manifold?
Ok, so when the sensor is cold it will read 5v, which is lean.
As the sensor warms up it should start reading accurately, which will almost always be rich. The computer is waiting for the voltage to drop to about 1v so it can attempt closed loop. Rich/lean only updates when in closed loop.
If your sensor never sees a rich condition then there could be an exhaust leak, any cracks in the manifold?
I found an Orange wire with black strip which is a power wire to the o2 senasor relay had been cut and soldered to a red hot lead leaving the rest of the OR/Bl to the fuel pump resistor dead.
I would post a picture of the wire switch but there is no way to do so without that picture coming from a URL.
I reconnected the wires back and this is the results.
https://youtu.be/GKnDxs-Xxrc
Doesn't go open/closed thoug and don't know why. Also not sure if STFT is normal.
I passed smog with excellent numbers, and have been running the Walker since.
It's two years later now and time for another smog check.
The real question is, does your current sensor still work properly? They should last you a fairly long time if you aren't running rich or swamping it constantly.
Hard to know for sure about sensors matching their picture unless you order it or call me thinks.
I guess my question is really a larger one as to whether or not the newer non-ceramic O2 sensors are correct fits for the Renix system.
Good Question. I was worried about my first solid NGK since it was so different looking from the old ceramic one, but it has worked just fine for me for the past couple years. Odd it wouldn't quite work for your setup.
The real question is, does your current sensor still work properly? They should last you a fairly long time if you aren't running rich or swamping it constantly.
Hard to know for sure about sensors matching their picture unless you order it or call me thinks.
Good Question. I was worried about my first solid NGK since it was so different looking from the old ceramic one, but it has worked just fine for me for the past couple years. Odd it wouldn't quite work for your setup.
My 89 now has 556,000 miles on original engine and transmission and 100 mile round trip a day for work. Love it still since I bought it new in 89.
But his question has me wondering if the old style Real Renix sensor is vanishing and the computers are replacing them with the HO sensors by mistake. If that is the case we need stock up before the the good ones are all gone, and get in touch Bosch/NGK management and let them know. The Off road outfirts like 4WD online might have some clues as to what is going on.
This was the sneaking suspicion I had, thank you for putting it into words. It just seems odd that suddenly it's very difficult to get the ceramic sensors - whether or not that's by updated/cheaper designs or database/AI error is the question. The Walker catalogue I linked above shows what appears to be the correct ceramic model as 250-23500 but for a Jeep 86-90 4cyl so I imagine it's somewhat different.
It's encouraging that Nick's NTK is working; if anyone would know his O2 was out of spec it'd be him :laugh:
My 89 now has 556,000 miles on original engine and transmission and 100 mile round trip a day for work. Love it still since I bought it new in 89.
My 89 now has 556,000 miles on original engine and transmission and 100 mile round trip a day for work. Love it still since I bought it new in 89.