Engine runs, but config needs review.
"Nissantrigger 360+4"
4cyl
- primary trigger: 4 pulse
- secondary trigger: 360 pulse
- was triggerlog captured with primtrig rising or falling ? (write rising or falling in the filename next time).
symptoms:
- RPM-reading fluctuates.
- cyl1,4 ign is OK,
- but cyl2,3 ign is 20 degrees off (advanced?)
- with per cyl spark delay it can be fixed, but RPM-reading still fluctuates
To check:
- primtrig rising or falling edge
Most likely edge related
- Either the choice of primary trigger edge
- or the assumption (from available descriptions and patent) at the time of implementation was wrong
- even with a real disk, the direction of rotation can be wrong and the polarity of nissan HALL also could be uncertain.
We're investigating this but still no proper info:
- primtrig scopeshot would be highly welcome
- even with soundcard
- even DVM voltage measurement of primary trigger (with running engine) would be some info about polarity.