Contour Enthusiasts Group Archives Forums General Troubleshooting Rejuvinating Catalytic Converter

Originally posted by GregH:

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it's a temporary fix. The way we do it in the shop is kill spark to two plugs (one on each bank) and rev the engine while watching catalyst temp with a pyrometer. At 1800 degrees, we restore spark and let it idle. repeat when it cools to 1000 degrees. For the realy bad ones, we kill spark first, then rev to 1500 degrees, then kill the injector on the cylinder with no spark, and run at high rpm to 2000 degrees. Restore spark and fuel and idle until 1000 degrees. Repeat as necessary until the front to rear switch rates look right. Have a fire extinguisher present!

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