Hello and thank you for the posts.
I think you already have the next direction in which to head when you mentioned
I'm wishing I had put a scope lead on the "Tach" output, and perhaps another on the power feed using a low amp probe. The reluctor looks good visually, but you never know.
Monitoring power supply but more importantly primary current may help here when under WOT at speed.
I was amazed during the case study below how “current” proved to be the revelation and not primary/secondary voltagehttps://www.picoauto.com/library/case-studies/1961-jaguar-e-type-3-8-unstable-idle-speed
Here we could monitor the true dwell times under cruise and idle, then compare them to events that take place under WOT/Full load
A reliable sync will always be challenging in these scenarios regardless of the style of HT pick up used if the cause of our fault effects the secondary voltage we are attempting to sync from.
I think the First Look sensor or the WPS will prove invaluable here looking at activity in both the intake and exhaust when under the fault condition.
I know this will be challenging but if we can hold the fault condition at WOT we can hopefully reveal a pattern in the captured pressure waveforms
I hope this helps and any feedback would be most appreciated