[DML] Re: Source of My misfire and other problems

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

An O2 sensor (aka Lambda Probe) can also be contaminated by leaded gas
or silicone gasket sealer. The leaded gas isn't so bad because once it
is used up it is gone. The silicone is BAD because when you replace
the sensor the gasket sealer will continue to contaminate every sensor
you put in. You MUST use ONLY "SENSOR SAFE" silicone gasket sealer. It
has to say so right on the tube. If you have any doubts you have to
disassemble the parts that are contaminated with the sealer and remove
it. You will know you have a contaminated engine if, when you replace
the O2 sensor, it soon fails again. They last for 60,000 miles but the
EPA has determined that they are lifed (in this application) for
30,000 so at least 90% of installed sensors will be operational at
30,000 miles. That is unless they get contaminated. A fouled sensor
will usually come back to life after you get the cylinder firing again
and the sensor gets hot enough for a while. Use Never-Seize on the O2
sensor, just be careful not to get it on the probe, just the threads.
Again, to verify that the ECU is good you can test it as per the
Workshop Manual.
David Teitelbaum
vin 10757 




-- In dmcnews@xxxxxxxxxxxxxxx, Phil Priestley <phil@xxxx> wrote:
> 
> Got to thinking about the O2 sensor today and did a search on what 
> contaminates them. The main thing that was mentioned on the bosch site 
> is coolant  and fouled plugs and that got me thinking that when the 
> head corroded through there was coolant coming out the tail pipes and I 
> 








To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/