When I was logging data on the other neat thing (DTC 1515) I discovered today, I also noticed I was running 43.5* of timing at 15.09 (stock map)... Guess I've been dodging the blown brand new 408 bullet for a couple of days...

So I looked a little deeper... When I start getting into it, my dynamic cylinder air plummets to 0.01 g/cyl (effectively 0) and the airflow plumets to at least 50% of what it was before. When I come off the throttle, it returns to normal. All of this with no codes...

Any ideas?

Could replacing a ground strap on the passenger side with 14 gauge wire and putting both straps to a header bolt instead of the back of the block locations be the root of this or do i have some weird intermittent short somewhere?

 

I would think that sounds like Torque Management kicking in. Do you still have TM in place? If so, remove it and re-log your same scenario and see what the data looks like then.

of course, I could just be smoking crack

 

TM would be pulling spark. That is, if I had allowed it to live