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The mkiv Supra Owners Club

Melted cat


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Quote: from Gareth Davies on 5:35 pm on Mar. 27, 2002[br]One presumes if he lost 3 plugs he would have at some point or another.

 

Ok Gareth, I walked into that one! :-)

 

(Actually I didn't know if he meant the plugs were completely sh*gged out, or they just looked dodgy upon removal).

 

Catalysts don't like misfire. I think it has something to do with unburnt fuel entering the exhaust system. It may only apply to close-coupled catalysts which are near to the exhaust manifold. I'll have a chat to some of our development guys to find out how tolerant they are.

 

Apart from cats, misfire (in excess - lots of cylinders for a long time) will "wash" the cylinder bores with fuel, causing accellerated wear, and if any fuel gets beyond the piston rings you can get a degree of oil dillution.

 

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