My o2 readings at idle, 175 degrees, 1500 rpms.
B1S1: 0.9ish
B2S1: 1.02
B1S2: 1.02
B2S2: 1.02
Don't rightly care about the post cat ones. The readings indicate dead sensors, yes?

 

If your readings are in live mode where you can see them fluctuate then yes, they're peaked except B1S1.

 

I was always wondering what the O2 sensor readings should be outputting. My pre cats bounce between 0 and 0.98 ish and the post cats usually linger just below 1, with the occasional .2 or something on acceleration or engine breaking

 

Trip to town and back readings, 14 miles round trip.
To town:
Engine temp about 170. Closed loop. 45-55 mph.
B1S1: 0.9x - .5x No fluctuation, just steady drop.
B2S1: 1.02 No variation
B1S2: 1.02 No variation
B2S2: 1.02 - .9x
Last mile before destination:
Open loop.
B1S1: 0.05
B2S1: 1.02 No variation
B1S2: 1.02 No variation
B2S2: 0.06

Back home after 5 min stop:
B1S1: 1.02 No variation
B2S1: 1.02 No variation
B1S2: 1.02 No variation
B2S2: 1.02 - .9x

Amazon Prime is awesome.

 

Yes it is! I just ordered an Idle Air Control Solenoid for $22.29 with free shipping....... I fixed mine for the 10th time again and getting tired of soldering the coil's four hair-like fine wires back to the head cap connector. I can only stair at minutia for about so long through a magnifier before wanting to go postal.

Looks like your O2's are roached..... I'd be doing the same but I should rebuild the motor instead of tossing bucks at it. I've got better weather ahead to work on my warm weather plastic car, would rather get it going instead, it's cheaper on fuel and gives me my first break with the Rover in eight years as a dd.

 

No C.E.L. though. Didn't check pending.

 

You can't see the O2 readings on a live reader that only updates every one second. You'd need a reader that updates several times a second, and records the waveform over time. O2 signals are waveform. If you want to see some, just do an image search for "02 sensor signal"

example:




What you can infer from a simple ODBII reader is that the sensor is not totally dead. If the reading is steady at 0V or 0.01V, or at ~1V, etc. and the one-second update never catches a change in the signal, then there's something wrong. You get a sort of "yes" or "no" binary diagnosis. But to see more than that, you need a somewhat sophisticated reader.

 

Thanks ihscouts, binvanna.
Using an Ultra-gauge. 1 sec refresh. I was pretty sure my o2's where wacky just needed to "see" it and get second opinions.
I'm used to watching the voltage flux and can get an idea of how they are acting by the swing of the mV. I am an old Turbo Buick guy, '86 - '87, that tinkered with data loggers (25 fps on a pre obdII even), Mass Air Flow translators, progressive alcohol injection, and all kinds of fancy things. But it has been almost 10 years since I played with such things.

Definitely not a Buick.

 

What year is your D1? Just curious.

 

It is a '97.