This concerns C004 trigger with cam sync. I have an engine with a problem with recent firmwares, it's a Volvo 4 cyl that has 2 teeth on the front accessory pulley and camsync on the intermediate shaft (rotates at cam speed). It uses a wasted spark coilpack for ignition so it needs the cam sync. It ran with 1.0.73 for a long time, then I upgrade to 1.1.79 a little less than a year ago, and this setup was tuned and worked.
Here comes the problem, we wanted the new features with injector angle curve that came with 1.1.80, so upgraded to 1.1.88 as it would be really interesting to tune the injector angle curve as it is an Alpha-N tuned engine with lots of valve overlap, Speed-Density doesn't work well except for full throttle (no good pressure signal).
A very apparent problem appeared, I could not get any RPM signal. It was zero at all times, except when I disabled cam sync as a test. The "Running On/off" status flag flashes when the primary trigger has events, but RPM = 0. The triggerlog looks just clean and healthy - and why shouldn't it, all we changed was firmware.
I tried downgrading from 1.1.88 to 1.1.81, same results. RPM only returned with disabled cam sync.
- Triggerlog, looks ok : [ c004-camsync-issue.triggerlog.txt]
- The 1.1.88 config : [1.1.88.vemscfg]
Config files for 1.1.79 (original that ran) and all files are here :
http://www.vems.hu/files/MembersPage/MattiasSandgren/C004andCamSync/
I will downgrade to an earlier 1.1.7x if this doesn't work out as it did work with 1.1.79, but I'll use 1.1.78 since 1.1.79 is not available and was only uploaded about a year ago because it had just become available (and later removed).
What's the status here? I suspect the firmware doesn't handle this simple case, and if it should handle it - where is my configuration error? It's the same settings that the configlet suggests for C004 + cam sync.
//Mattias