Based on the fact that many properly operating and tuned DeLoreans are wearing their original Cats well over the 100K mile design target, I'd say the design was sound. That's probably longer than most of those smog pumps last, at least on the cars I've seen and owned. Don't mistake lack of maintenance and age-related deterioration for a design flaw. We're driving these cars 12+ years after they were supposed to be dead. Sometimes we forget about that. Dave S -- In dmcnews@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> wrote: > David Teitelbaum and I are basically saying the same thing -- excess > unburned fuel damages a catalytic converter (what does removing a smog > pump do -- eliminates continued burn in the exhaust stream, leaving > excess unburned fuel. I compound the problem by eliminating EGR too). > > The question is: does lack of a DeLo smog pump (and EGR -- that's what > the blocked off ports in the U pipes are for) by design cause long > term damage to its converter? > #5939 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/