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Overheating the catylist (archive)
[ Follow Ups ] [ 5-series (E28) Message Board ] [ Msg. Board FAQ ]
Posted by Bob on December 25, 2000 at 03:32:58:

In Reply to: Re: Free Downpipes posted by Bob K. on December 24, 2000 at 17:52:11:


The nominal DME mixture setting that the computer uses when the O2 sensor disconnected will NOT cause the cat to over heat. In fact, the mixture is within a few % of what the O2 sensor would command closed loop. That extra few % is enough to smooth out the usually lean M30 engine.

Bob


I bought a M30 engined car that had had the cat "cleaned out" with a broom handle when it clogged. Nice exhaust note, no restriction, and a free solution! I doubt the cat "can" alone adds any restriction and still looks stock, BTW.


Yeah, I was thinking of broom-handling as well. Sounds like it might be the way to go.

Actually I was more interested in running the motor without the O2 sensor connected, and was concerned about the possibility of overheating and thereby creating a possible restriction.




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