Thanks, I took them out, put them back, unhooked the battery ground in case it might reboot without a CEL, and it did and ran fine. Maybe a deteriorated wire that needed to be shifted back? Considering your appraisal of these plugs, I'll expect them to disappoint me soon and plan on popping in some more reliable ones.Has an oil drip from the filler neck down into a sparkplug well, but that did't seem to affect the old NGK plugs. Add to the variables a recent trans flush (maybe air bubbles working themselves out;I did have to add some more ATF the day after) and it's still a mystery why it misbehaved. It's my girlfriend's car, so I'm sure I'll get a full report. Nice car, over all.