Re: O2 sensor damage?

["cruznmd" <racuti1@xxxx>]

I haven't used any gasket sealant due to fear of contamination. I 
have used NAPA silicone spray lube on the car at various times. I 
don't recall ever directly injecting it into the engine but over 7-9 
months, who knows?

I am using Mike Cohee's analog dwell meter. I will refer to the 
manual section you've called out.

I was unable to perform any tests or repairs because we got hit with 
an unreal storm just as I pulled up in front of my house. Every tree 
in the median outside my development was torn down before my eyes 
blocking the road. Not saplings either. I then looked at the tree 
next to my car, and relocated the car to the middle of the parking 
area just in case.

I think little silver cars are good luck or something.


Rich
#5335 -Md

--- In dmcnews@xxxxxxxxxxxxxxx, "David Teitelbaum" <jtrealty@xxxx> 
wrote:
> Usually an O2 sensor is not damaged from an overly rich mixture. 
When
> you finally lean it out it will come back to life. You CAN damage it
> by contamination. If you do not use "sensor safe" silicone gasket
> sealer you will not only ruin the O2 sensor currently installed but
> any replacements you install! There are tests of the Lambda system 
you
> can do to make sure the rest of the system is functional. Refer to
> D:04:15 # 5 A.-E. There have also been cases (not on Deloreans) of
> using silicone cleaners on the motor and when the motor was running 
it
> was ingested and contaminated the O2 sensor. If you are using a
> digital dwell meter to check the Lambda don't trust it. Most can't
> read it right. You really need an old analog type with a needle to 
get
> the readings you want. Remember we are dealing with 80's technology 
so
> you have to try to use the test instuments that the people had
> available then.
> David Teitelbaum
> vin 10757
> 
> 
> --- In dmcnews@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote:
> > Can you ruin an O2 sensor with a super-over rich condition or 
with 
> > excessive heat, say from a glowing cat?
> > 
> > The dwell meter on my car says the lambda computer and hence the 
freq 
> > valve are not operating properly.
> > 
> > Since I've been told by multiple sources that the ECU almost -
never- 
> > dies, the O2 sensor is the most logical next item. The problem 
is, 
> > mine's nearly new. I did have it installed way back when my fuel 
> > system was totally hosed. I got the cat converter to glow cherry 
red 
> > a few times.
> > 
> > Thanks,
> > 
> > Rich