Thanks. I'm enlightened. Thank you, gentleman. Guess that's to the source of my issue.

As to the transition problem, I've been all over the TPS and idle adjustment (My third d-jet car).
Actually, when i got the car and was struggling to get it to idle properly, i found that the throttle plate screws had worked loose (fortunately had't been sucked into the engine) and the plate wasn't seating properly. But, fixing that I still had a situation where coming off run the idle would not settle, but drop precipitously, almost to a stall, and then come back up to the proper setting. No matter what I tired, i couldn't correct this. Had an old 142 control box sitting around and put that in and it solved that problem (but not the transition problem), so, naturally, I bought a brand new control box. But it went back to the RPMs dropping precipitously. Over the years I've fooled with MPS adjustments...I have any number of those units to fiddle with, and I can get it to transition fine, but it runs incredibly rich. I'm not skilled enough or instrumented enough to be able to make ideal adjustments to the MPS (that would probably help the problem).

Would love to put in a MegaSquirt and be done with this, but, again, that's beyond my ken, at least the intellectually and computer programming part. Wish i could find someone in my area with experience who could guide me through the process. Or, at the very least, be able to get the damn head off and replace the cam...that's something I've done back in the old soft-lobe days.

As I say, if you drive the car the way a car with a hot cam is supposed to be driven, there are zero problems. But that just doesn't match my