O2 sensor codes?

[franklin2]

It's always difficult to determine if the oxygen sensor is good and giving good information, or is it lying to you. I think you said you had other signs that it is running rich? If so, then the O2 sensor is doing it's job and telling the truth.

 

[GabrielPantoja1997_4.0]

Hm interesting. So with my o2 sensors heater showing the proper ohm reading, having the proper voltage being sent down on the harness side, and no blown fuse, and no other codes than the ones I originally posted with, my gut is really saying PCM isn't responding to the reading from the o2 and is fixed rich. I wish I had a proper scan tell to tell for certain, but a junkyard pcm will set me back 80 bucks, and a decent scan tool that can show me live data sits right around that price to. I'm going to go with my gut and grab a PCM in the morning and I'll report back.

 

[Orca]

I wish I had a proper scan [tool] to tell for certain, but a junkyard pcm will set me back 80 bucks, and a decent scan tool that can show me live data sits right around that price to.

Food for thought... If you have a Windows laptop (XP or higher) or an Android or iOS smartphone or tablet, you should be able to run FORScan. If so, all you'd need is an inexpensive (as low as $21 for a known-good model like the Bluetooth one by 'BAFX Products') scantool and you'd have access to live data.

 

[franklin2]

Hm interesting. So with my o2 sensors heater showing the proper ohm reading, having the proper voltage being sent down on the harness side, and no blown fuse, and no other codes than the ones I originally posted with, my gut is really saying PCM isn't responding to the reading from the o2 and is fixed rich. I wish I had a proper scan tell to tell for certain, but a junkyard pcm will set me back 80 bucks, and a decent scan tool that can show me live data sits right around that price to. I'm going to go with my gut and grab a PCM in the morning and I'll report back.

You are making a big assumption. But sometimes it's the only way to tell what's wrong, and you can keep some of these spare parts for next time. It would be interesting what something like Forscan would tell you. Not sure what a 1997 system would tell you, I know the pre OBDII systems won't tell you anything.

 

[GabrielPantoja1997_4.0]

Alright for 28 bucks, I picked up a pcm from the junkyard (albeit out of a auto trans truck) and everything runs much smoother, no more engine shaking or smelling like gas. I also ordered a for scan tool off of amazon for 20 bucks that comes in tomorrow, I'll plug in the old pcm and share the scan data with y'all just to completely confirm a shot pcm