I think that I did something wrong, the last weekend I have got problems with my O2 sensor (one wire).
I ordered one AC Delco AFS-74 (3 wires heated) it is not yet installed because I miss the counter connector.
This weekend I start the car and the O2 sensor seems to work! However, after 30 minutes drive stops sending voltage to the ECM.

What I did before this situation appears is:

I change the oil pan gasket and because I didn’t have the RTV silicone sealing I use the Loctite 510.
According to Loctite it is:
LOCTITE 510 Gasket is a single component, medium strength, anaerobic sealant with good heat resistance. The product cures at ambient temperature when confined in the absence of air between close fitting metal surfaces.

Will be that the problem? (Anaerobic will destroy the O2?)

If it is yes, how long will it takes before I can put my new heated sensor?
Any suggestions will be appreciated.
Regards,
Cobra289

 

If it doesn't specifically say, O2 sensor safe, it's not.

The PCV system will suck the fumes right out of the crankcase, and kill the O2.

O2s are extremely sensitive to poisons.

After ANY, engine work, I run at least 100 or 200 miles before installing an O2 sensor. And I mean ANY.

 

Hi Grumpy,
That is what I was suspecting.
What was I thinking during the gasket change?
As soon the O2 sensor fails the car run's like S**T, I suppose the "Limp home" mode. It is an 87 with an 89 EPROM hock up to the PROMinator and an 89 code (APYS).
Is it possible to get a better run of the car with out the O2 during the 200 miles?
Thanks for your advice.
Regards,
Cobra289

 

Limp Home technically means the process has died. Your in Soft Fail Mode.

Set the C/L enable temp., high enough so that it doesn't apply,
or, try unplugging the MAF.