[Shotimes] What can destroy a cat?

[Shylo McKinsey]

Thermostats which are stuck open will also destroy
cats. How quickly does your engine heat up?

Shylo McKisney

'91 White POS

--- cmichaelo@optonline.net wrote:
> I have now destroyed my second catalytic converter.
> I'm trying to find out if something is wrong my
> engine, or if the cats were just of poor quality to
> begin with. 
> 
> Both cats were bought from Sho Shop in 1997. 
> 
> The first cat lasted about 40k, and the second about
> 30k.  
> 
> I strongly suspect that the first cat died to some
> prolonged trouble with the MAF which produced rich
> fuel mixture. During the life of the first cat I
> only averaged 17-18 mpg.
> 
> But with the second cat I had no such problem with
> the MAF.  I'm now averaging 20-21 mpg. However, I do
> have an excessive oil consumption, and I'm wondering
> if oil is leaking into the cylinders and is burning
> up, if that can destroy a cat?
> 
> What else could destroy a cat?  I have 130k on the
> car. New oxygen sensors. New 77mm ProFlow MAF. No
> chip.  Good acceleration.  Good idle.  Car is due
> for 60k though.
> 
> Michael Olsen
> 94MTX,green,BOX+
> 
> [demime 0.99d.1 removed an attachment of type
> text/x-vcard which had a name of cmichaelo.vcf;
> charset=windows-1252]
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