Quote:
Originally Posted by index1489
On the E46 DME the car will cut fuel to a misfiring cylinder to protect the cats, and that was in the late 90s.
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That's an emergency feature and it's really for getting your car off the road. If you have and intermittent or slight misfire, that feature won't protect you at all. I've been told by numerous industry professionals who work with cars of various vintages that all say emphatically not to drive with a misfire because of resulting damage not only to the cats but to the rest of the engine. Oh and my E90 did not shut down a cylinder when one of my coils failed completely.