I'm not saying that it can't happen but I've played with the temp and baro sensors and saw no timing change on my strobe. Moved the temp sens from cold to hot water and sucked and blowed on the baro tube, no change. But engine wasn;t under load and maybe the mpem knew that. One little known feature of the mpem is a something that works like a throttle position sensor. By timing the acceleration of the crank it knows whether you are on or off the throttle. This feature does make timing changes. This MAY make it hard to do timing curve checks unless the engines is under load. As far as I can tell the dpm feature is independant of the timing. I can see where it would be possible to use the dpm to bring on a rich failsafe condition based on coolant temp? The wiring diagrams I've looked at show the temp sensor only tied to the idiot light, no mpem wiring. If you say there is another set of wires from the coolant sensor to the mpem I'd guess overheat protection using the dpm on dpm sleds, and possibly timing on non dpm? Since the move to DC on the new sleds I suspect doo has made some changes. I've found doo very tight lipped about the mpem, kind of a need to know basis. I'm not sure even the race shop guys really know alot about it? From what I've seen they just take some timing out of the midrange, extend advance a little on top, and turn off the rpm limiter.