O2 Sensors-ODB1Read-25/26 (1 Viewer)

[Reachej]

1994 FZJ80
PAIR removed-new, OEM O2 sensors installed on exhaust manifold
New Cats and exhaust (could the wrong configuration throw 25/26? The guy who did it wasn't a LC specialist by any means)
EGR crippled
Injectors just cleaned and 1 given new core, was not firing (#6)
Had been throwing code 25 and before injector job
No codes for a week or so, now 25/26
Generally running and idling pretty well but smells very obviously rich.
Just set up an ODB1Read

My understanding is that 25/26 together is usually or almost always O2 sensors or associated wiring. I know sensors could be DOA but... For now am assuming that if it is either it is the wiring, which generally looks like it's been under a LC for 30 years but doesn't have any immediately obvious cuts or what not.

What am I looking for on the ODB1READ to tell if there is a problem with one of the sensors? If the issue is wiring would there be no signal at all?
If I can use the ODB1READ to tell me one way or another without going through all the wiring that would be great but most definitely got the device while needing to learn how to read it.

 

[ppc]

@Reachej , Anything is possible. Don't get lazy, check it all out. If you have a custom exhaust then the bungs for the O2 sensors could be in the wrong position. The tip of O2 sensor could be either inserted to shallow or to deep into the exhaust pipe. The ODB1read is not a miracle device that's going to pinpoint one problem. It provides helpful data that still needs to be interpreted.

 

[Reachej]

@Reachej , Anything is possible. Don't get lazy, check it all out. If you have a custom exhaust then the bungs for the O2 sensors could be in the wrong position. The tip of O2 sensor could be either inserted to shallow or to deep into the exhaust pipe. The ODB1read is not a miracle device that's going to pinpoint one problem. It provides helpful data that still needs to be interpreted.

The sensors are on the manifold as mentioned. Interpreting the helpful data was the main question. Thanks.

 

[CharlieS]

Any chance they are plugged into the wrong bank of cylinders? Swap the plugs, pull the ecu fuse to reset the codes, start it up and see if it throws any codes.