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? Did JZD misuse a converter designed for other emissions components? Volvo was air injecting and exhaust gas recirculating the exact same block in its North American imports. Even if the DeLo converter is adequate for an F series engine, is E series by nature too rich (something to consider before swapping fuel distributers and CPR's). Bill Robertson #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/