Members Page/Per Boddum - VEMS wiki www.vems.hu

MembersPage/PerBoddum (2014-03-13 17:50:27)

I have switched from a megasquirt to a Vems but have now problems with the trigger signals.

Primary and camsync trigger is hall.

Vems cannot properly detect trigger sequense from Nissan 300ZX hall module with 12-1 triggerwheel.

Car is race V8 engine, high compression and cranking at approx 80..113 rpm. The cranking rpm varies very much due to the high

compression.

When turning distributor by hand with ocsilloscope connected there is no doubt where missing tooth is. Allways 11 tooths between the

missing tooths and the camsync signal comes on triggertooth 0 (first tooth after missing tooth)

I have also tried disabling camsync all together, but it makes no difference.

When turning the distributor by hand (approx 80..100 rpm in vemstune) sometimes the sparkplugs ignite.

The rpm signal in vemstune (1.5.24) seems to be very stable. No flickering rpm signal.

Triggerlog when engine is cranking.

Triggerlog when distributor is driven by hand

Vems config

Picture of triggerwheel 12-1

I really need some help to get this Vems setup to work.