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Date:         Tue, 23 Jan 2001 11:36:37 EST
Reply-To:     EdVF1000R@AOL.COM
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         "Ed @ Automotive Consulting" <EdVF1000R@AOL.COM>
Subject:      Re: Catalytic convertor
Content-Type: text/plain; charset="US-ASCII"

IMHO there is little difference if any in fuel economy if the cat-con is absent or present in good shape. The O2 sensor is located before the cat-con, not after it, and therefore would read the same, cat or no. The only difference would be slightly less backpressure with the cat deleted, a non issue if stock mufflers are retained. Note that none of this applies to OBD2 cars, (1996-up) which have o2 sensors before and after the cat and much more programming to monitor cat-con efficiency. They will still run the same,but will set off the check-engine light.


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