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Strobe shows different angle than what we expect
with (InputTrigger/ShortGapTrigger) InputTrigger/SubaruTrigger :
- I downloaded the config from one subaru
- uploaded to another
- ign advance is off, just like it was also off on the other Subaru
- just to clarify: the ignadv is displayed OK in megatune, (and on LCD mlp00 bottom right corner), but the strobe shows the ignadv changes half angle of what it should.
I was tuning the car last night, and the advance seems to be off:
- strobed at 10degrees, so this is right
- if I write 40 degrees in the megatune sparktable
- measured on the crank, of course (not on cam)
- some smart strobes are confused by the wasted spark ignition, this actually happens quite often.
- Can you do measurements the 40deg and 10 deg with same strobe settings (or a dumb strobe, and see angle difference on engine ?)
Can you describe the strobe and its usage in great detail ?
- type
- switches
- what knobs
- display
- ...
This way earliest is 37.5 crankdegrees BTDC (max commanded ignadv is 63.75 degrees.
This is from the helpful [VEMS FORUM]
There are trigger errors when cranking, though the wiring seems OK
- and i cant seem to find any info, regarding the "advanced filtering" settings, if that maybe can help filtering that out
- GenBoard/UnderDevelopment/FirmwareChanges, (toothrel_normal and toothrel_missing ) multitooth advanced filtering so thresholds can be set for what is considered as long-gap (eg. 125-420%, in actuality 60/30 and 90/60), and what is short (eg. 16-100%, in actuality 30/90 ).
- car will sometimes backfire when cranking
- the "crank minimum usec" shouldn't cause that (you can set it to 370 usec, that is 20 degrees at 9000RPM, or you can even try 0). If it's too high, high-RPM triggerinput will not be believed
Link to some info to how ms extra does subaru, can any of you see what the vems is missing to filter the noise, if this ms extra setup works, interesting that they trigger on raising egde
- MS trigger on falling egde!!
Another link with a sulution to ms setup with the exact same symtems as i got when cranking.
http://www.msextra.com/viewtopic.php?f=91&t=28092
We scoped the oe dwell time, and that is 3ms.
- Now cranking 200 RPM (OK),
- car runs fine, when it is started, only cranking is out of sync
- but sometimes backfires during cranking?
Crank and camsensor signal scopeshot - looks OK. VR (LM1815 input) triggering on falling edge of the EC36/27 and EC18/12
Also measure DC voltage of both triggers (engine off, but ignition on).
- EC36/27 DC measurement: ...???... V (primtrig sensor: 1.9k Ohm)
- EC18/12 DC measurement: ...???... V (sectrig sensor: 1.9k Ohm)
This subaru legacy is running the 6/7 trigger setup
as it seems no one have had this running with a VEMS yet, i hope to have some help setting this up,
I will, then document it,so it will be pnp for other users.
D.10/7-2008 :This is the current setting.
Firing order 1-3-2-4
primary_trigger=29
secondary_trigger=59
tooth_wheel=02
trigger_tooth=00
another_trigger_tooth=03
crank_minper=BC
tooth_wheel_twidth1=00
tooth_wheel_twidth2=00
cam_sync_r_edge_phase=00
cam_sync_f_edge_phase=00
reset_engphase_after=04